CGDC4: Event Horizon
Event Horizon, by the_Corruptor (Canada), is action game of mouse-play that implements the "ball physics" theme and creates gameplay that revolves around it, literally. We're going to keep these introductions short and leave the discovery up to you.
Please be kind and provide feedback and constructive criticism for the game author in the comments.
Game link: http://jayisgames.com/cgdc4/?gameID=1