The game was great with it's assets with visual and audio.
The slow down time mechanic is cool but doesn't really serve much purpose I mean you slow down the enemies shots but also your own making it not super useful if you were able to still move at the same speed and everyone else was slowed it'd be a lot more useful.
Level 3 seems kind of like a kill chamber you can get through it but the difficulty isn't in anything other than you have a bunch of enemies if you had like a boss or something that'd make it much more interesting.
otherwise great work!