I like the concept! Also, maybe make the levels actual stages of some sort? Currently the only reason something seemed to be a stage, was because the screen changed, but since the score and stuff carried over, it didn't really feel like a level as much. I had no clue whether it had any influence on how well I was doing overall, whether I was supposed to have zero at the end of the game or between levels. I also didn't really like the floatiness as others have pointed out. However, good work otherwise, especially for a one-man project!