The graphics were gorgeous, the gravity switch mechanic was really creative, and I liked how I was able to navigate past enemies even without a bullet: it was just that shooting down an enemy could make a select area easier, if I was willing to sacrifice my ammo on it. Like other people in the comments have mentioned, however, it can be pretty difficult at times. I think some sort of checkpoint system would be helpful, especially in the first level, as that's when players will be learning the ropes and getting used to how things play. That's just a suggestion, of course! The game was fun as it is, and while difficult, it wasn't impossible. It's a good stand alone platformer!