Snaaaaaake (v3, Scratch Programming Playground)
Use the arrow keys to move the snake around. Try to eat the apples, but don't run into the walls or yourself. The more the snake eats, the longer it gets!
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This game is featured in the book "Scratch Programming Playground", which you can read online for free at https://inventwithscratch.com
Version 3 of this game adds a cheat: press the space key and you will be able to run into yourself without losing. (But you still can't touch the walls!)