I like the concept and the simplicity of it plus is fun to thrown the Shmushes around but I'm not sure the "auto-scrolling" really works here. Mainly because there's no indicator of how hard I'm going to "flick" them and what's on the other side and I have to sit and wait for the camera to catchup.
Perhaps creating a single "large room" with obstacles wit the objective being something like "Get as many LARGE Shmushes to the goal as possible" while avoid obstacles/hazards and maybe rescuing others from crates but only if you are a certain size, might be a good alternative.