diff --git a/index.ts b/index.ts
index 75acb52..5e63b96 100644
--- a/index.ts
+++ b/index.ts
@@ -4,27 +4,48 @@ import {
 	clearScreen,
 } from "./window.ts";
 import { codeSheet } from "./sheet.ts";
-import { refreshKeyboard } from "./keyboard.ts";
-import { repl } from "./repl.ts";
+import { refreshKeyboard, keyPressed, K } from "./keyboard.ts";
+import { repl, resetRepl } from "./repl.ts";
+import { addToContext } from "./runcode.ts";
 
 const game = codeSheet(0);
 
 game.init();
 
-let mode: "play" | "edit" = "edit";
+let mode: "play" | "edit" | "repl" = "repl";
+
+addToContext("play", () => {mode = "play"});
 
 clearScreen();
   
 await mainloop((_t) => {
 	// TODO: use t
-	if (mode === "play") {
-		game.update();
-		game.draw();
-		frame();
-	} else if (mode === "edit") {
-		repl.update();
-		repl.draw();
-		frame();
+	if (keyPressed(K.ESCAPE)) {
+		console.log('pressed escape');
+		if (mode === "play") {
+			resetRepl();
+		}
+		if (mode === "edit") {
+			clearScreen();
+		}
+		mode = ({
+			play: "repl",
+			edit: "repl",
+			repl: "edit",
+		} as const)[mode];
+	} else {
+		if (mode === "play") {
+			game.update();
+			game.draw();
+			frame();
+		} else if (mode === "repl") {
+			repl.update();
+			repl.draw();
+			frame();
+		} else if (mode === "edit") {
+			clearScreen();
+			frame();
+		}
 	}
 	refreshKeyboard();
 });
diff --git a/keyboard.ts b/keyboard.ts
index bbc39df..1705a6a 100644
--- a/keyboard.ts
+++ b/keyboard.ts
@@ -97,14 +97,14 @@ export const refreshKeyboard = () => {
 
 export const keyPressed = (key: string | number) => {
 	if (typeof key === "string") {
-		key = key.charCodeAt(0);
+		key = key.toUpperCase().charCodeAt(0);
 	}
-	return keyboard.has(key) && keyboard.get(key)?.repeat!;
+	return keyboard.has(key) && (keyboard.get(key)?.first! || keyboard.get(key)?.repeat!);
 }
 
 export const keyDown = (key: string | number) => {
 	if (typeof key === "string") {
-		key = key.charCodeAt(0);
+		key = key.toUpperCase().charCodeAt(0);
 	}
 	return keyboard.has(key) && keyboard.get(key)?.held!;
 }
@@ -115,7 +115,7 @@ export const shiftKeyDown = () => {
 
 export const keyReleased = (key: string | number) => {
 	if (typeof key === "string") {
-		key = key.charCodeAt(0);
+		key = key.toUpperCase().charCodeAt(0);
 	}
 	return keyboard.has(key) && !keyboard.get(key)?.held!;
 }
diff --git a/repl.ts b/repl.ts
index df972c5..a944929 100644
--- a/repl.ts
+++ b/repl.ts
@@ -5,18 +5,22 @@ import { runCode } from "./runcode.ts";
 
 const lineHeight = 6;
 
+const history: Array<string> = [];
+let historyIndex = history.length;
+let textLinesAbove: Array<string> = [];
 let maxLineLen = 0;
-let line = "";
+let currentLine = "";
 let index = 0;
-let y = 0;
-let result = "";
+
+export const resetRepl = () => {
+	historyIndex = history.length;
+	textLinesAbove.length = 0;
+	maxLineLen = 0;
+	currentLine = "";
+	index = 0;
+}
 
 const update = () => {
-	if (result) {
-		console.log("result:", result);
-		y += lineHeight; // TODO: multiply if multiline
-		result = "";
-	}
 	for (const key of getKeysPressed()) {
 		let char = String.fromCharCode(key).toLowerCase();
 		if (shiftKeyDown()) {
@@ -27,11 +31,11 @@ const update = () => {
 			}
 		}
 		if (char in font) {
-			line = line.slice(0, index)+char+line.slice(index);
+			currentLine = currentLine.slice(0, index)+char+currentLine.slice(index);
 			index += 1;
 		} else if (key === K.BACKSPACE) {
 			if (index > 0) {
-				line = line.slice(0, index-1)+line.slice(index);
+				currentLine = currentLine.slice(0, index-1)+currentLine.slice(index);
 				index -= 1;
 			}
 		} else if (key === K.ARROW_LEFT) {
@@ -41,31 +45,60 @@ const update = () => {
 			}
 		} else if (key === K.ARROW_RIGHT) {
 			index += 1;
-			if (index > line.length) {
-				index = line.length;
+			if (index > currentLine.length) {
+				index = currentLine.length;
 			}
+		} else if (key === K.ARROW_UP) {
+			historyIndex -= 1;
+			if (historyIndex < 0) {
+				historyIndex = -1;
+			}
+			const lineAtHistory = history[historyIndex] ?? "";
+			currentLine = lineAtHistory;
+			index = currentLine.length;
+		} else if (key === K.ARROW_DOWN) {
+			historyIndex += 1;
+			if (historyIndex > history.length) {
+				historyIndex = history.length;
+			}
+			const lineAtHistory = history[historyIndex] ?? "";
+			currentLine = lineAtHistory;
+			index = currentLine.length;
 		} else if (key === K.ENTER) {
-			const ran = runCode('return '+line);
-			console.log('ran:', ran);
-			result = ran?.toString?.();
+			history.push(currentLine);
+			historyIndex = history.length;
+			textLinesAbove.push("> "+currentLine);
+			try {
+				const ran = runCode('return '+currentLine);
+				const resultString = ran?.toString?.() ?? null;
+				if (resultString !== null) {
+					textLinesAbove.push(...resultString.split("\n"))
+				}
+			} catch (err) {
+				textLinesAbove.push(...(err.name+":\n"+err.message).toLowerCase().split("\n"))
+			}
+			textLinesAbove = textLinesAbove.slice(-20);
 			maxLineLen = 0;
-			line = "";
+			currentLine = "";
 			index = 0;
-			y += lineHeight;
 		}
 	}
-	maxLineLen = Math.max(maxLineLen, line.length);
+	maxLineLen = Math.max(maxLineLen, currentLine.length);
+}
+
+const drawTextAbove = () => {
+	textLinesAbove.forEach((line, i) => {
+		faux.draw_rect(0, i*lineHeight, 4*(line.length+1)+1, lineHeight+1, 6);
+		faux.draw_text(-1, i*lineHeight, line);
+	});
 }
 
 const draw = () => {
-	if (result) {
-		faux.draw_rect(0, y, 4*result.length+1, lineHeight+1, 6);
-		faux.draw_text(0, y, result);
-	} else {
-		faux.draw_rect(0, y, 4*(2+maxLineLen+1)+1, lineHeight+1, 6);
-		faux.draw_rect((2+index)*4, y+1, 4, lineHeight-1, 3);
-		faux.draw_text(0, y, "> "+line);
-	}
+	drawTextAbove();
+
+	faux.draw_rect(0, textLinesAbove.length*lineHeight, 4*(2+maxLineLen+1)+1, lineHeight+1, 6);
+	faux.draw_rect((2+index)*4, textLinesAbove.length*lineHeight+1, 4, lineHeight-1, 3);
+	faux.draw_text(-1, textLinesAbove.length*lineHeight, "> "+currentLine);
 }
 
 export const repl = {