nogame screen: escape key quits love.

src/scripts/nogame.lua

@@ -3257,6 +3257,12 @@ function love.nogame()
 		end
 	end
 
+	function love.keypressed(key)
+		if key == "escape" then
+			love.event.quit()
+		end
+	end
+
 	function love.resize()
 		create_world()
 	end

src/scripts/nogame.lua.h

@@ -11986,6 +11986,14 @@ const unsigned char nogame_lua[] =
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