This is definitely one of the better games that I have played on my Droid. The option let you really tweak the difficulty which is great for people with different experience levels in tower defense games. I don't see a way to get a description of the types of towers during game play which can be annoying to newcomers who don't know what they want to build in their first few games played. Besides that it is an amazing game. The achievements and upgrade points make the game a real thrill to play through over and over.