OK, I've beaten both medium and hard. Very slick game. Attached is my solution to Medium. The upgrades on the pellet towers are simply a mad dash to try and kill the split blobs of Span Boss 48. I've found that the trick to the last boss levels is then the spawn bosses enter, send the flying bosses at the same time. The fliers so fast they are past the spawns before I even get a shot off at the spawns. Once they're dead, everything is killing the spawns. Until the 80 regulars come in at the end.



Dammit... How do image tags work again?

Edit: You have to click the attachment link and copy the actual file location.
--_l0ser