Complete and good Presentation/Design is what stands out of this game for me.
This is one of the games that actually feel complete in the gamejam, it has the right amount of levels with good level design and also has fully-working mechanisms.
The presentation and art design is awesome, well thought off, but one thing the slider and text beside it showing the gravity charge could have been improved but still other than that it is really good.
As improvement, maybe somehow make the game a bit more fun to play like adding more new objects to the mix. That's all, love the game and congrats on finishing! Also just realized that you solo developed this which really makes it more amazing, well done!