You lose! Have I ever started?!

It's impossible to win (if you expect a standard TD), just too many enemies in the same moment, and no prevoius instruction. Try to add a tutorial, there's also a bug, if you lose, but you don't press "Ok" you can still play, at least you can put towers in price order (the first time I started with Fire and Ice tower, and I soon found myself without money and towers). Also I like the idea of levels (even though it isn't new), but I think it could be more enjoyable by adding a story (this could be a good way to add a tutorial). Hope I'll see the new version, but there's a lot of work. Good luck.

Fair Start

I find the concept enjoyable, but noticed a number of glitches. The return to menu button sometimes just freezes the baddies with no prompt, the inability to place towers on lvl 4, the "You Won" pops up before the last string appears, and I couldn't get the upgrades to work.
Would like to see element interactivity/vulnerability, maybe enemies that shoot your towers, or pop when they die.
I hope this is helpful, I would enjoy the hell out of a polished version of this.

needs improvement guy

have you even tried playing this yourself? make a start button so someone can figure it out instead of immediately bum rushing you

Generic tower defense game

This is a great start, but it needs a ton of improvement before it can be considered complete:
No background music -1 (boring)
No tutorial -3 (no idea what I was doing)
Textures -2 (almost painful to look at)

Also notable: -2
Upgrades don't do a whole lot, placing more towers overpowers upgraded towers (upgrades are not worth the price).
Upgraded tower textures don't change, should be some kind of identifier.
Generic enemies, almost all the same, only identifier is the sprite.

Overall: 2/10 NEEDS WORK

many Room for improvement

Nice solid defencegame ind the first level.
The second level doesn'nt work. I can't build towers!