I completed all 24 levels.
Overall, this was pretty fun. I've played a few versions of games like this, and while its not a unique concept, I thought this was pretty fun.
Levels 13-20 introduce hazards and teleports but you can skip them all and go straight to the hole.
On level 24, there is no reason to use the teleport, as again, you can just draw a line that gets the ball straight to the hole
The dotted lines showing your previous attempt when you UNDO is a good touch.
Keep up the good work.