A functional and competent platformer, but the level design is easy to a fault with not much in the way of a gradual mounting challenge from one level to the next and the jam theme isn't touched upon at all really.
There are clearly some sections where I'm supposed to collect the anti gravity power and fly into the next one to deactivate it which sounds interesting in theory, but it's all too easy for me to either fly around it and past it or fly through before it even has a chance to spawn into the level. But even if I did collect it and go back to regular gravity, the levels themselves are far too trivial.
Maybe add some moving platforms, moving buzz saws and crushing walls for the sequel?