The game concept is good, the graphics are so-so, quality is pitiful though.
Let me explain, the game has a MAJOR glitch involving mobs getting stuck on corners, and the pathfinder has to be reset completely if you make a mistake. Along with that there are nearly invisible blocks on a map to stop you from building at them, either make the whole map pathable, or make it EXTREMELY visible, not a shade off players need to know considering you make them reset the WHOLE PATH if they make a mistake and get stuck in a corner. Not to mention that unlike a TRADITIONAL Tower Defense game, instead of having your buttons on the side or bottom to make "towers" you click on the tile and select what you want, not very intuitive from a site that prides itself on tower defense games. And if there had been ANY play testing of this by a normal player these flaws would have been caught immediately. Maybe try to release a minecraft tower defense 3 and fix these things and it MIGHT be worthy of having that name in it's title.