This is a remixable engine! NOT a game! This has code that can help you polish your game. Hover mouse above 1 to make it do stuff. Move mouse around so that 4 can follow. 2 and 3 you don't have to interact. Type 1 to go to 1, 2 to go to 2, and so on. spacebar to see all of them on one sprite.
Code for 1 from @Funut and intro from @DerpAnimation. The rest is from me.