Tower Defence

I have to say, I really love the idea of having a max amount of enemies and THAT'S what kills you, instead of having to defend a specific point or "castle", etc. Very unique approach. I would love to see you make more of these to show your skills as they develop.

Really hate not being able to tell which towers have been upgraded. Bad lag once you get past lvl 1.

Gonna have to agree wholeheartedly with Qedrakmar's comment.

Can't wait to see how far you take your game making!

I would say the next thing you need to work on is more visual feedback on the gameplay. For a tower def game, that would be things like visuals to see which towers have been upgraded, or health bars (maybe a mouse-over, or some other form of status feedback) for the creeps. Luckily, for a T.D. the gameplay is standardized enough that you can "get by" assuming that everyone playing the game already knows the mechanics and behavior, but if you were to explore another genre of game, the user feedback would be even more critical to a feel of successful gameplay. Other people might complain about badges, art, music, or extra difficulties, but all of that is secondary to a solid experience that makes the player want to come back. I was a little sad this ended so quickly, but that means I had some vestment in continuing to play, so I'll call this a fun start, and I'm looking forward to what you come up with next.

Well, I think I beat it...

need to be able to upgrade range and fire rate, and a way to skip to next unit.
if this is your first game good first try

differnet day, same "make your own TD game" crap !!!