3 stars: This could be by far the greatest game that I have played on an Android device. The only problem with it, is that it is way too many levels in the tutorial phase. I have been playing this game now for like nearly 20 levels and still I'm having tutorial bullcrap. I would have already deleted it, but I like the game. You should definitely give an option to skip the tutorial section. Then you would be at a five-star.
5 stars: Nice graphics and game play. I enjoy it since it's well explained since the beginning. It's nice to unlock new heroes without the need of expend any money.
3 stars: Fun game, but devs need to fix the problem of auto selecting characters that are close to buildings when you're trying to select the buildings...annoying.
5 stars: Add a bestiary to learn about the enemies and bosses, please. Or in this case add an enemies category in the help section to view enemy stats as well as a bosses category to view boss stats, please.
4 stars: I recently discovered that after spending sometime with the game it always turn off the haptic feedback on system settings and I need to manually reactivate it.
3 stars: You have such a diverse enemy lineup, you need more units, also. The unit acquisition is pretty hard, I'm uninstalling :(
4 stars: This is a great tower defense game. Gameplay is fun and the graphics are great. However, I'm downgrading to four stars for one reason. It takes way too long and way too many catalysts to upgrade towers ...