Reminds me of Super Monkey Ball! Very fun! Maybe a indicator of which way the level is going to shift to give the player some time to react would be cool (i'm picturing a warning label with an arrow pointing to the direction). 

Cheers!

Check out the game I worked on at: https://itch.io/jam/gmtk-2020/rate/696851 (dl exe recommended). 

Nice difficulty and a good concept!

Interesting game! I wish there's a bit more to it but still pretty fun!