diff --git a/webui/src/components/Editor.tsx b/webui/src/components/Editor.tsx
index 2566079..d190e3c 100644
--- a/webui/src/components/Editor.tsx
+++ b/webui/src/components/Editor.tsx
@@ -50,13 +50,24 @@ interface EditorProps {
 	fontSize?: number;
 }
 
+const STORAGE_KEY = "minimax-editor-content";
+
 export const Editor = forwardRef<any, EditorProps>(function Editor(
 	{ initialValue = "", onChange, onReady, fontSize = 14 },
 	ref
 ) {
 	const textareaRef = useRef<HTMLTextAreaElement>(null);
 	const editorRef = useRef<any>(null);
-	const [content, setContent] = useState(initialValue);
+
+	const getInitialContent = () => {
+		if (typeof window !== "undefined") {
+			const saved = localStorage.getItem(STORAGE_KEY);
+			return saved || initialValue;
+		}
+		return initialValue;
+	};
+
+	const [content, setContent] = useState(getInitialContent);
 
 	useImperativeHandle(ref, () => editorRef.current);
 
@@ -100,6 +111,11 @@ export const Editor = forwardRef<any, EditorProps>(function Editor(
 		editor.on("change", (instance: any, changes: any) => {
 			const newContent = instance.getValue();
 			setContent(newContent);
+
+			if (typeof window !== "undefined") {
+				localStorage.setItem(STORAGE_KEY, newContent);
+			}
+
 			onChange?.(instance, changes);
 		});
 
@@ -129,7 +145,7 @@ export const Editor = forwardRef<any, EditorProps>(function Editor(
 		<div className={styles.editorContainer}>
 			<textarea
 				ref={textareaRef}
-				defaultValue={initialValue}
+				defaultValue={content}
 				placeholder="Code goes here"
 			/>
 		</div>
diff --git a/webui/src/components/Playground.tsx b/webui/src/components/Playground.tsx
index fea1a43..5809558 100644
--- a/webui/src/components/Playground.tsx
+++ b/webui/src/components/Playground.tsx
@@ -85,11 +85,14 @@ export default function Playground() {
 				}
 			);
 		} catch (ex) {
+			console.error(ex);
 			if (resultRef.current) {
 				resultRef.current.value += `\nScript exited with error:\n${ex}\n`;
 			}
 			terminalRef.current?.write(
-				"\r\n\x1B[1;31mScript exited with error:\x1B[0m\n\r" + String(ex).replace("\n", "\n\r") + "\r\n"
+				"\r\n\x1B[1;31mScript exited with error:\x1B[0m\n\r" +
+					String(ex).replace("\n", "\n\r") +
+					"\r\n"
 			);
 		}
 
@@ -130,11 +133,14 @@ export default function Playground() {
 				bulkRounds
 			);
 		} catch (ex) {
-				if (resultRef.current) {
+			console.error(ex);
+			if (resultRef.current) {
 				resultRef.current.value += `\nScript exited with error:\n${ex}\n`;
 			}
 			terminalRef.current?.write(
-				"\r\n\x1B[1;31mScript exited with error:\x1B[0m\n\r" + String(ex).replace("\n", "\n\r") + "\r\n"
+				"\r\n\x1B[1;31mScript exited with error:\x1B[0m\n\r" +
+					String(ex).replace("\n", "\n\r") +
+					"\r\n"
 			);
 		}
 
@@ -257,100 +263,243 @@ export default function Playground() {
 				<h2>Game Rules</h2>
 
 				<p>
-					This game is played in two rounds,
-					on an empty eleven-space board.
-					The first round is played on {"Red's"} board, the second is played on {"Blue's"}.
+					This game is played in two rounds, on an empty eleven-space
+					board. The first round is played on {"Red's"} board, the
+					second is played on {"Blue's"}.
 				</p>
 
 				<p>
-				On {"Red's"} board, {"Red's"} goal is to maximize the value of the expression.
-				{" Blue's"} goal is to minimize it.
-
-				Players take turns placing the fourteen symbols <code>0123456789+-×÷</code>
-				on the board, with the maximizing player taking the first move.
+					On {"Red's"} board, {"Red's"} goal is to maximize the value
+					of the expression.
+					{" Blue's"} goal is to minimize it. Players take turns
+					placing the fourteen symbols <code>0123456789+-×÷</code>
+					on the board, with the maximizing player taking the first
+					move.
 				</p>
 
 				<p>
-				A {"board's"} syntax must always be valid, and
-				the following rules are enforced:
+					A {"board's"} syntax must always be valid, and the following
+					rules are enforced:
 				</p>
 
 				<ol>
 					<li>Each symbol may only be used once</li>
-					<li>The binary operators <code>+-×÷</code> may not be next to one another, and may not be at the end slots.</li>
-					<li>The unary operator <code>-</code> (negative) must have a number as an argument. Therefore, it cannot be left of an operator (like <code>-×</code>), and it may not be in the rightmost slot.</li>
-					<li>Unary <code>+</code> may not be used.</li>
-					<li> <code>0</code> may not follow <code>÷</code>.
-					This prevents most cases of zero-division, but {"isn't perfect"}.
-					<code>÷-0</code> will result in an invalid board (causing a draw),
-					and <code>÷0_+</code> is forbidden despite being valid syntax once the empty slot is filled.
-					This is done to simplyify game logic, and might be improved later.
+					<li>
+						The binary operators <code>+-×÷</code> may not be next
+						to one another, and may not be at the end slots.
+					</li>
+					<li>
+						The unary operator <code>-</code> (negative) must have a
+						number as an argument. Therefore, it cannot be left of
+						an operator (like <code>-×</code>), and it may not be in
+						the rightmost slot.
+					</li>
+					<li>
+						Unary <code>+</code> may not be used.
+					</li>
+					<li>
+						{" "}
+						<code>0</code> may not follow <code>÷</code>. This
+						prevents most cases of zero-division, but{" "}
+						{"isn't perfect"}.<code>÷-0</code> will result in an
+						invalid board (causing a draw), and <code>÷0_+</code> is
+						forbidden despite being valid syntax once the empty slot
+						is filled. This is done to simplyify game logic, and
+						might be improved later.
 					</li>
 					<li>Division by zero results in a draw.</li>
-					<li>An incomplete board with no valid moves results in a draw.</li>
+					<li>
+						An incomplete board with no valid moves results in a
+						draw.
+					</li>
 				</ol>
 
 				<h2>How to Play</h2>
 				<ol>
-					<li>Click <strong>Run</strong> to start a single game. Play against your agent in the terminal. Use your arrow keys (up, down, left, right) to select a symbol. Use enter or space to make a move.</li>
-					<li>Click <strong>Bulk Run</strong> to collect statistics from a many games.</li>
+					<li>
+						Click <strong>Run</strong> to start a single game. Play
+						against your agent in the terminal. Use your arrow keys
+						(up, down, left, right) to select a symbol. Use enter or
+						space to make a move.
+					</li>
+					<li>
+						Click <strong>Bulk Run</strong> to collect statistics
+						from a many games.
+					</li>
 				</ol>
 
-
 				<h2>Overview</h2>
 				<ul>
-					<li><code>step_min()</code> is called once per turn with the {"board's"} current state. This function must return an <code>Action</code> that aims to minimize the total value of the board.</li>
-					<li><code>step_max()</code> is just like <code>step_min</code>, but should aim to maximize the value of the board. </li>
-					<li>Agent code may not be edited between games. Start a new game to use new code.</li>
-					<li>If your agent takes more than 5 seconds to compute a move, the script will exit with an error.</li>
+					<li>
+						<code>step_min()</code> is called once per turn with the{" "}
+						{"board's"} current state. This function must return an{" "}
+						<code>Action</code> that aims to minimize the total
+						value of the board.
+					</li>
+					<li>
+						<code>step_max()</code> is just like{" "}
+						<code>step_min</code>, but should aim to maximize the
+						value of the board.{" "}
+					</li>
+					<li>
+						Agent code may not be edited between games. Start a new
+						game to use new code.
+					</li>
+					<li>
+						If your agent takes more than 5 seconds to compute a
+						move, the script will exit with an error.
+					</li>
 				</ul>
 
 				<h2>Rhai basics</h2>
 				<p>
-					Agents are written in <a href="https://rhai.rs">Rhai</a>, a wonderful embedded scripting language powered by Rust.
-					Basic language features are outlined below.
+					Agents are written in <a href="https://rhai.rs">Rhai</a>, a
+					wonderful embedded scripting language powered by Rust. Basic
+					language features are outlined below.
 				</p>
 				<ul>
-					<li>All statements must be followed by a <code>;</code></li>
-					<li>Use <code>return</code> to return a value from a function.</li>
-					<li><code>print(anything)</code> - Prints to the output panel. Prefer this over <code>debug</code>.</li>
-					<li><code>debug(anything)</code> - Prints to the output panel. Includes extra debug info.</li>
-					<li><code>()</code> is the {"\"none\""} type, returned by some methods above.</li>
-					<li><code>for i in 0..5 {"{}"}</code> will iterate five times, with <code>i = 0, 1, 2, 3, 4</code></li>
-					<li><code>for i in 0..=5 {"{}"}</code> will iterate six times, with <code>i = 0, 1, 2, 3, 4, 5</code></li>
-					<li><code>let a = [];</code> initializes an empty array.</li>
-					<li><code>a.push(value)</code> adds a value to the end of an array</li>
-					<li><code>a.pop()</code> removes a value from the end of an array and returns it</li>
-					<li><code>a[0]</code> returns the first item of an array</li>
-					<li><code>a[1]</code> returns the second item of an array</li>
-					<li>Refer to <a href="https://rhai.rs/book/language/values-and-types.html">the Rhai book</a> for more details.</li>
+					<li>
+						All statements must be followed by a <code>;</code>
+					</li>
+					<li>
+						Use <code>return</code> to return a value from a
+						function.
+					</li>
+					<li>
+						<code>print(anything)</code> - Prints to the output
+						panel. Prefer this over <code>debug</code>.
+					</li>
+					<li>
+						<code>debug(anything)</code> - Prints to the output
+						panel. Includes extra debug info.
+					</li>
+					<li>
+						<code>()</code> is the {'"none"'} type, returned by some
+						methods above.
+					</li>
+					<li>
+						<code>for i in 0..5 {"{}"}</code> will iterate five
+						times, with <code>i = 0, 1, 2, 3, 4</code>
+					</li>
+					<li>
+						<code>for i in 0..=5 {"{}"}</code> will iterate six
+						times, with <code>i = 0, 1, 2, 3, 4, 5</code>
+					</li>
+					<li>
+						<code>let a = [];</code> initializes an empty array.
+					</li>
+					<li>
+						<code>a.push(value)</code> adds a value to the end of an
+						array
+					</li>
+					<li>
+						<code>a.pop()</code> removes a value from the end of an
+						array and returns it
+					</li>
+					<li>
+						<code>a[0]</code> returns the first item of an array
+					</li>
+					<li>
+						<code>a[1]</code> returns the second item of an array
+					</li>
+					<li>
+						Refer to{" "}
+						<a href="https://rhai.rs/book/language/values-and-types.html">
+							the Rhai book
+						</a>{" "}
+						for more details.
+					</li>
 				</ul>
 
 				<h2>Notable Functions</h2>
 				<ul>
-					<li><code>Action(symbol, position)</code> - Creates a new action that places <code>symbol</code> at <code>position</code>. Valid symbols are <code>01234567890+-/*</code>. Both <code>0</code> and <code>{"\"0\""}</code> are valid symbols.</li>
-					<li><code>board.can_play(action)</code> - Checks if an action is valid. Returns a boolean.</li>
-					<li><code>board.size()</code> - Return the total number of spots on this board.</li>
-					<li><code>board.free_spots()</code> - Count the number of free spots on the board.</li>
-					<li><code>board.play(action)</code> - Apply the given action on this board. This mutates the <code>board</code>, but does NOT make the move in the game. The only way to commit to an action is to return it from <code>step_min</code> or <code>step_max</code>.
-						This method lets you compute potential values of a board when used with <code>board.evaluate()</code>.
+					<li>
+						<code>Action(symbol, position)</code> - Creates a new
+						action that places <code>symbol</code> at{" "}
+						<code>position</code>. Valid symbols are{" "}
+						<code>01234567890+-/*</code>. Both <code>0</code> and{" "}
+						<code>{'"0"'}</code> are valid symbols.
+					</li>
+					<li>
+						<code>board.can_play(action)</code> - Checks if an
+						action is valid. Returns a boolean.
+					</li>
+					<li>
+						<code>board.size()</code> - Return the total number of
+						spots on this board.
+					</li>
+					<li>
+						<code>board.free_spots()</code> - Count the number of
+						free spots on the board.
+					</li>
+					<li>
+						<code>board.play(action)</code> - Apply the given action
+						on this board. This mutates the <code>board</code>, but
+						does NOT make the move in the game. The only way to
+						commit to an action is to return it from{" "}
+						<code>step_min</code> or <code>step_max</code>. This
+						method lets you compute potential values of a board when
+						used with <code>board.evaluate()</code>.
+					</li>
+					<li>
+						<code>board.ith_free_slot(idx)</code> - Returns the
+						index of the <code>n</code>th free slot on this board.
+						Returns <code>-1</code> if no such slot exists.
+					</li>
+					<li>
+						<code>board.contains(symbol)</code> - Checks if this
+						board contains the given symbol. Returns a boolean.
+					</li>
+					<li>
+						<code>board.evaluate()</code> - Return the value of a
+						board if it can be computed. Returns <code>()</code>{" "}
+						otherwise.
+					</li>
+					<li>
+						<code>board.free_spots_idx(action)</code> - Checks if an
+						action is valid. Returns a boolean.
+					</li>
+					<li>
+						<code>for i in board {"{ ... }"}</code> - Iterate over
+						all slots on this board. Items are returned as strings,
+						empty slots are the empty string (<code>{'""'}</code>)
+					</li>
+					<li>
+						<code>is_op(symbol)</code> - Returns <code>true</code>{" "}
+						if <code>symbol</code> is one of <code>+-*/</code>
 					</li>
-					<li><code>board.ith_free_slot(idx)</code> - Returns the index of the <code>n</code>th free slot on this board. Returns <code>-1</code> if no such slot exists.</li>
-					<li><code>board.contains(symbol)</code> - Checks if this board contains the given symbol. Returns a boolean.</li>
-					<li><code>board.evaluate()</code> - Return the value of a board if it can be computed. Returns <code>()</code> otherwise.</li>
-					<li><code>board.free_spots_idx(action)</code> - Checks if an action is valid. Returns a boolean.</li>
-					<li><code>for i in board {"{ ... }"}</code> - Iterate over all slots on this board. Items are returned as strings, empty slots are the empty string (<code>{"\"\""}</code>)</li>
-					<li><code>is_op(symbol)</code> - Returns <code>true</code> if <code>symbol</code> is one of <code>+-*/</code></li>
 
-					<li><code>rand_symb()</code> - Returns a random symbol (number or operation)</li>
-					<li><code>rand_op()</code> - Returns a random operator symbol (one of <code>+-*/</code>)</li>
-					<li><code>rand_action()</code> - Returns a random <code>Action</code></li>
-					<li><code>rand_int(min, max)</code> - Returns a random integer between min and max, including both endpoints.</li>
-					<li><code>rand_bool(probability)</code> - Return <code>true</code> with the given probability. Otherwise return <code>false</code>.</li>
-					<li><code>rand_shuffle(array)</code> - Shuffle the given array</li>
-					<li><code>for p in permutations(array, 5) {"{}"}</code> - Iterate over all permutations of 5 elements of the given array.</li>
+					<li>
+						<code>rand_symb()</code> - Returns a random symbol
+						(number or operation)
+					</li>
+					<li>
+						<code>rand_op()</code> - Returns a random operator
+						symbol (one of <code>+-*/</code>)
+					</li>
+					<li>
+						<code>rand_action()</code> - Returns a random{" "}
+						<code>Action</code>
+					</li>
+					<li>
+						<code>rand_int(min, max)</code> - Returns a random
+						integer between min and max, including both endpoints.
+					</li>
+					<li>
+						<code>rand_bool(probability)</code> - Return{" "}
+						<code>true</code> with the given probability. Otherwise
+						return <code>false</code>.
+					</li>
+					<li>
+						<code>rand_shuffle(array)</code> - Shuffle the given
+						array
+					</li>
+					<li>
+						<code>for p in permutations(array, 5) {"{}"}</code> -
+						Iterate over all permutations of 5 elements of the given
+						array.
+					</li>
 				</ul>
-
 			</SidePanel>
 		</div>
 	);