Nice looking game! Things i would change:
-On the beggining, you have the "intro cinematic". I would put 2 black bars on the screen to show that it is a cinematic. I got confused thinking the character was moving alone.
-Cooldown on jumping is WAY too long in my opinion. Of course it makes the game a bit more challenging, but it also slows the pace a lot and is frustrating.
-Sound for killing enemies... Feedback for the player.
Other than that, its a pretty solid game :P