a fantastic tower defence game!
good graphics, solid action, interesting designs of each tower/defensive mechanism, and good battles in each wave!
(while the enemies are as unique and as diverse as your own towers...)
the only criticism that i will make is that the towers range should be visible BEFORE you buy it, and not just afterwards...
all in all, this is a very good game, and im grateful for the easy difficulty option, as it made the game more enjoyable and relaxed for me.
keep up the good work!