I really like the idea, though in practice it makes it really really hard to control the ball. Very smooth and satisfying when it goes where you want it though.
I got stuck at the right edge of the map, where you have to go up.
Maybe instead of holding down the mouse and waiting, the blast intensity could be based on how far away you release the mouse from the click point, kinda like a slingshot?
Anyway, good luck with your cut!