Main screen's controls are offscreen
Some camera shake when shooting would make the game feel a ton times better. The recoil on the gun and the sounds are pretty solid.
Some sound or animation when hitting enemies would be great. Also, a healthbar to know if you actally have a chance at defeating anything would be awesome
A deathscreen would also be nice
Besides that, the game was decent. I couldn't go far, enemies are way to fast for me to aim properly and you die in about 5~7 hits ): but it was fun