not very good
this game should not have gotten past the portal in my opinion but ill give you somthing to work on with your next game
make diffrent looks for the towers they all look the same exept for color.
the coin gathering to spending ratio at the rate i was getting coins and the amount of coins i was getting at the end of each round id take me 75 rounds to get ONE sniper tower.
there was no break in between the waves giving you no time to place/stratagize for your tower placement.
try being a little more creative alot of TD games have been made and if you want to get anywhere your going to ahve to a dd SOME kind of twist instead of being the one average part of every game made combined.