it always bugs on the last wave.
before last wave comes there is a message saying you already won and should move forward to the next mission, but if you click the 'help' button everything freezes.
Excellent game!
The large scale battles were the best part... but they could beimproved a bit:
1- We could be able to give orders to NPC soldiers (defend this position, atack in this direction, etc)
2- Multiplayer!!!!!!!
3- spend the gold you gain from killing to buy more soldiers or towers.
Well, we developers all have to start somewhere. :P