I have this game on mobile. And it's based on tower defense system. And it has some nice heroes and some really good gameplay. I am so far loving the game. Have you tried this game? Its on both android and iOS.
Yes the tower defense game genre is hot. And people are loving playing with heroes system in the tower defense games. I think that's what makes it interesting.
I can imagine. The only tower defense game I really got into would be a Pokemon Tower Defense game on newgrounds, years ago. By the way, is this app free?