This is pretty good! I think the ball mechanic are okay but maybe a heavy ball that would bounce of of things better. Go ahead and check out my game submission for the Jam. It's minigolf on planets, let me know what you think.
I just did the youtube tutorial (attempt) drag-a-line style thing and it was hard when I jumped to the new InputSystem. A week later I kinda almost figured it out. Your game is an inspiration!