Hey. Cool Idea for a game.
I like the way it looks. and feels, the controls are easy and fluid. I think the level of variation in terms of what to do needs to be a bit higher, but I understand that there was a time limit. As others have said, spamming space is Overpowered. so I'd nerf it with a cooldown meter. Also, the amt of health is a bit too generous imo.
I liked the idea that if you get hit, you can't charge for a while, so you can't tank a bullet in the name of positioning yourself in front of an enemy. Good idea!
I'd be curious to see what the game would feel like with more enemies/powerups/etc.
The music is pretty nice to. did you make it yourself?
Anyway, great showing for the jam. Cheers.