Good game with a bit of challenge!
Gravity works nicely, it forced me to think differently and I could see different approaches to the level. Giving momentum from the start was quite clever BTW.
I don't have much negative things to say.
Maybe the shooting part was a bit weird? Once I realized I could shoot continuously it felt like shooting all the time was a good strategy (but should it be?), but before that it felt a bit too hard to target the enemies.