Finding the best compression for this data is certainly an interesting problem and I don't mind at all if people pipe up on that (I used a compression scheme in Spinning World, for example, and am always looking for improvements).

However, for the purposes of this golf game, let me clarify that the golf score (491 in my example fat test program above) is calculated for the code before the __DATA__ only. You get the __DATA__ and the Saturn shape for free in this game because in the obfu I can, cough, get it very cheaply by reading the source.