All options lead to the level selector, options should be highlighted when you point your mouse over them, the music is good, i think the red text is a debugging feature? If you hold space the character will auto double jump, i don't know if that's good, also if you spam jump some times bullets won't de-spawn, there should be a way to know how many hp the enemies have and when you kill them they should explode, you only need to slide once, so that mechanic is kinda pointless, also in the tutorial you tell the player how to pick weapons (i didn't know i had to press e), a pause menu to quit from is needed, and you get heal to little on the first level, when you slow time your dash regenerates at the same speed, so you can actually dash more times by slowing time, auto reload would be nice when you run out of ammo, also i saw one enemy shoot through wall.