The Exorcists: Tower Defense

I love td games. This ones entertaining enough to keep me intrigued for a couple weeks I think.

I have 414 of 420 stars but have beat the game. Are there hidden levels or is it a bug? There are many levels on ipad that the icons or menus cover up important parts of the screen, such as for upgrading towers. Some cannot be upgraded at all due to you not being able to click in those areas. Lastly, this game needs a wiki or help files! No clue how to get the two red legendary characters. Nothing anywhere about them. And nothing even to tell us the difference between heroes (do some have dodge or higher health or are they all the same?)

... but since the game is asking me to give it a review this early in, I can give it four stars for gameplay and appearance. But I won't know 'til I've spent a bit more playing the game whether or not it's actually a five-star or a three-star game. For now, I think four stars is fair.