Fun idea but seems like there may be a couple bugs. It seemed like I kept getting sent back to the start, even when I didn't get shot. Sometimes the "shrapnel" from exploding bullets would make it impossible to shoot the opponents. Worst thing though was that after buying some towers nothing seemed to happen. This was on FF on linux if it makes any difference.

Was fun to play though on the first level I was stuck as the enemy decided to sit there out of bounds where I was unable to shoot it . Otherwise a fun game. 

It's and interesting idea that sounds fun, just the invisible wall glitch is pretty annoying.

If there's a way to make the text more readable (color or size?) it would be helpful.

Also, having enemies spawn in different locations would make the gameplay more dynamic.

The game is quite fun :) I like the idea of collecting the coins to build the towers. the enemies are very difficult after the first wave as most of your bullets don't ever make it to the enemy (just kills their bullet). the particles and the way the coins jump up after killing an enemy is quite satisfying.

Different kinds of enemies would make the game more interesting.

Besides the enemies getting stuck, it is a great game so far.

you guys should add some flying enemies and an additional tower placement zone on the higher platforms, that way players have to take full advantage of the large play area