In any case, one suggestion: Make sure you take advantage of the mount ability. If you have any creatures suitable for mounts, be sure to give a price for a PC to buy them. That was great in Adventurer's Vault so people have an idea of what they'd cost. I think the Blackjacket Bolter in the bug book is a mount, but you forgot to put (Mount) in parenthesis after the type... but yeah, a price would have been nice.
Just a suggestion... (Oh, and if you REALLY want to make me happy, have a Giant Guinea Pig or Riding Cavy as a mount.. My wife would be ecstatic!)