love this game
a bit challenging, gets harder on more advanced levels,i like the graphics too.
ideal to play when you have nothing to do too ^^ , its one ofthe tower defense games i love more.
a second part will be awesome to see, with more towers, more upgrades, and more looks for the characters when you upgrade them, maybe the skeletons can have some horns and better looking swords at advanced levels, things like that :3
also, increasing the damage of the "corpes" will be very usefull.