Not sure if it's a bug or a feature, but you can upgrade your abilities over and over again. After you complete a level, you can spend your money to upgrade things. Then close the game and then come back to the game. The game will start with your abilities upgraded AND with the money you had at the end of the last level. You can do this as many times as you like.
Bug: If a hedgehog is carrying a mushroom and is killed by a trap, the mushroom disappears, but seems to be counted as still existing. As a game play tip, if you make this happen with the last (or only) mushroom on a level, it is easier (guaranteed?) to finish the level as there is no mushroom for any animals to run off with.
It's like an MC Hammer minotaur. The game is fun if you sing "U Can't Touch This" as you move the minotaur around. Then again, I guess any game is fun if you sing "U Can't Touch This" as you play.
Great game. The AI is quite good most of the time countering attacks and choosing correct units in the correct spots. Nicely done. I'd like to add my voice to those requesting a pause button--very necessary.