I think this is my favourite :) I like that the instructions are there whilst I'm going through the initial "what is this?" stage, and then they go away :) I like the trail behind the moon. It's simple, yet it ramps up - my brain appreciates this today. Kinda like rotational pong (am I right in thinking that the position within the "bat" that the moon hits at causes the rebound angle to change?)... plus orbital mechanics? I got to 180! A suggestion... could the sound effect vary a bit, depending on the speed and direction that the moon hits at, to give a bit more feedback?