Arrow Keys or WASD/ZQSD to move, and click or click and hold to shoot. Try to make various different patterns and/or hit those falling shapes. There is a bug where you would get stuck in the ground after you land a normal jump. Jumping when stuck in the ground will send you really high up and backwards. Though this glitch could be used to completely *ninja* the game.
All credits by me, this was a remake of my other project Shooter. This project I officially no longer care about.