Use the arrow keys OR WASD to move around the square, and try to block all the incoming arrows! It'll get harder to hit the arrows, not only because they start coming faster, but because things start getting a lot more WILD. Press P to toggle the particle spray in the background. And yes, it's all pen-rendered. :D Honestly, the way to play the best is to learn the attack patterns. Once you understand them, you can survive for quite a while. My highscore is 1390.
This project now has WASD support. Courtesy of the Solar Wind Organisation: https://scratch.mit.edu/discuss/post/2365438/