It simply amazes me how you have managed to code this complex gravity mechanics in such a short period of time, you rock! It is indeed a tricky game, but at the same time I find it enterteining to keep trying even when I fail several times, and thats because of those amazing physics programming.
The visuals are amazing, it kinda gives me the retro vibes in an amazing way. Also love the cinematic detail when completing/failing a game, its so cool you have put so much attention in those details.
I hope you keep working on the project and add some audio design. Congratulations for such an outstanding game!