A very fun and unique mechanic with lots of room for expansion.
If I had to remake this I'd add in information about whether I need to get the ball into certain holes or if any hole will do, and I'd make the red line drawing for smaller balls work by clocking on the ball instead of behind it. I'd also put some warning in for the video because it freaked me out the first time, like a jump scare :P
Good work! Are you going to continue it after the jam?
Check out my entry if puzzles are your thing :)