Arrow keys to move. [SPACE] to return to the spawn point. S to fire. The red and blue portals allow you to teleport between the two. The spring boots let you jump higher and give you blue particles. The can of N-ER-GEE gives you speed and red particles. The green potion gives you immunity to the curse that the curse drone gives you. The curse both negates all boosts and lessens your jump height and speed. The red potion heals 5 health. The blue potion enhances your fire rate. The orange one enhances your max health. Pressing D toggles debug mode.
I made it all by myself. A few ideas from one of my classmates.