Great idea and level design! The art style is really good as well!
When the game is running at low FPS jumps aren’t high enough for some reason, making it impossible to complete. How do you exactly calculate jump force? Do you use Unity’s Rigidbody or something else? If something else, make sure it is using delta time.
It’s okay though, I was able to complete the game on my other more powerful machine. Keep up the good work!