I'm a bit confused about how the hero Aoyuki works. She seems to be doing 60 damage at the moment, not 105. Does 'four types alive' mean you have to have at least one of each colour currently in play (and alive)?
Excellent game, and lots of fun. As many others have commented, however, I completed the game before getting half of the upgrades. If new levels aren't really possible, then how about some challenges for each of the existing levels? Things like a maximum number of towers, an upgrade limit for each tower, no fear crypts, etc. I want a reason to keep on playing!
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Wroking on it