yikes...

The guy below pretty much said it all albeit only semi understandably. Lots of kinks to work out. I think you might want to consider a make your own maze kind of system. It's a lot better for games with little or no scenery. People judge a lot by looks alone.... And I forgot where I was going with this. But keep working on this game. I like the idea of element based turrets.

needs alot more work...
whenyou run out of mony you can still buy anything.
the turets show over the menues so you cand t read
the upgrade butten dosnt work
all descritions simply say undefined
the course select needs to e more organized like group the easy in one place and the med in another ect
also you should add health bars to the enimeys
also make a grid system so placeine your turets would be simpler and faster
make it so we can see the range and damage of the tower so we can place them acordingly on the map

this game is not ready to be submited perhaps you should work on it more and the re submit.