This was a bit difficult at first, but once I got the hang of the mechanics it got very fun very fast, especially as the grid and upgrade options expanded. The music and art are great, and the game is chock-full of juice and game feel as well. My only pieces of feedback would be to have a proper tutorial and a faster restart after dying (I died a lot), but I understand if you weren't able to include those because of the time constraints. Other than that though, great work on this fun and polished game. Backflip!