The idea is simple yet effective. The music is funky and the graphics is nice.
The only gameplay-related issue for me was the progression - it felt too slow i. e. I had to do too many similar runs without upgrading anything. Perhaps having upgrades cost cheaper but have less effect (whenever possible) could help - at least it would create a sense of progress.
Waiting to fall down might be a bit long, and it seems like it doesn't affect the gameplay - perhaps making it a short animation would provide an improvement.
Overall, these issues are minor and it is a solid submission, great job!