I actually like these games, but I agree that upgrades take way too long to earn. I also seem to be having trouble with the mute button. I have it muted, but it still gives occasional 'spurts' of sound when I hit some things.
another bug... near the end, about when I got the tesla rifle, my survivors started shooting toward the top left of the screen instead of at the enemies.
interesting game. I love defense type games, but this one needs a little work. The weapon upgrades are barely upgrades at all. They keep you almost even with the increase in strength of the enemies. It would be nice to have other things you could buy also.
the telekinesis ability gives a few problems with the logic of the game. If he could do that, he could turn the basic knife into a saw blade... just keep it spinning at high speed. Or throw the zombies around the room instead.
hm... I wish you could sell the weapons back again. I'm regretting upgrading to the assault rifle. The accuracy is bad and it's dropping my accuracy bonus during each level. I should've kept the shotgun and just upgraded it.