I like the idea that game changes as you complete the features. It looks really good for a game, even though the graphics are simple :) Keep up the good work :)

I liked the way the game assets built up as you "developed" them during the levels. I couldn't finish the Release level, though I tried quite a few times. On that note, I think being able to restart a level when you lose (e.g. with the R key), rather than return to the main screen every time, would be a good improvement. The gameplay reminded me of Audiosurf. The graphics and gameplay are simple but they work, so good effort for your first game.

When I started to play, I was like "Oh, they didn't have time to put sounds", and then I saw that you needed to make them XD
This concept was very intersting, and seeing the game changing along the way was cool!

The only thing I would point out is that you start the level too close to the obstacles. The last level was almost impossible to survive at the start when you had to move 2 positions to the side.

Good job finishing this game in time for the jam! ^^