Your Linux package's ReadMe.txt is marked as executable, fyi.
I quite like the effects and mood. It is quite soothing!
I'd only mention two things:
1. Some of the obstacles are a bit too dark in color. They blend in with the background, and I initially thought they were actually in the background, until I ran into one.
2. Maybe try softening the chime background noise a bit? Either lower the default volume, make it adjustable, or just reduce the amplitude of the chime track a bit. This may be a bit biased though, I'm up pretty late at the moment as is. Haha.
It was enjoyable to do for a few minutes before going to bed! Good job!