Hello there! Witch ball is definitely a great concept! I've tried to play with a friend on my mac but there is kind of a resolution problem. I'll put a screenshot, so if you can try to fix that for the Mac version, it would be amazing. Beside that the graphics are really nice and the gameplay is pretty neat! keep up the good work guys! 
Have you considered participating in our https://thegdwc.com ? The competition is totally free and with winning prizes! Our mission is to support and reward the Indie game developer community.