I really dig the cel-shaded look you're going for! I'm not sure if I missed it, but I'd love an option to increase the field-of-view. It can be a little bit disorienting when you're suddenly caught in a gravity zone, so I think that would help with helping me get my bearings!
The gravity-suppression cube is super cool and it's such a fun mechanic, but it's a little bit hard to figure out whether you're in the active area or not.
Still, you have a really awesome game in the works here. I can't wait to see what you'll keep doing with it!