Functions well as a flappy bird style game! A few points though;
- The moving floor at the bottom of the screen is incredibly distracting in my opinion
- It's possible to fly above the entire level and skip sections, which doesn't net you points but still seems to be an issue
- There seems to be a few issues with controlling the bat, the movement feels a little inprecise, maybe test it more and tighten some of the variables controlling movement