Hey man. The UI is a bit out of position. I think you need to change the UI scaling in Canvas to "fit to screen size" and then adapt it. That makes the UI look the same on all screen sized :)
Your game is nice. I kinda like the idea. The slow reversal and slow acceleration don't necessary feel good for me.
But good job finishing the game and you this is the most important thing in game design!
Would be cool if you could check out my game and provide some feedback :)
https://yapsinho.itch.io/me-myself-and-the-space-time-continuum