Hi, i downloaded it, and i have to say it plays quite well and fluid, graphics, sounds and music are good too. You also properly credited the artist, oposed to what mostly everyone does.

The only downside of this game is that is unknown if there is an ending, and you have to play it in the way the developer intended; that is, buy a certain upgrades in an order or die very early. You could ease this by rewarding the player money based on the wave reached the previous level, so even the most clumsy can eventually win, and the less patient dont rage quit at the 4th failed try.