I really like the game; I would give it a 5/5. There are a few minor issues. The first is no reward for accuracy. Gives a huge advantage to holding down the mouse button, and removes some skill from the game, especially early on. In addition, the aoe guns are far too effective. They should receive a slight fire speed nerf. Finally, the experience gain rate and money gain rate does not ramp up fast enough from wave to wave. Makes the level selector a little useless and the exp gain rate skill op. If you want to become strong really fast, just lump some points in exp gain early on. Try giving experience at an increasing rate from wave to wave instead of a flat, slowly increasing line, and make lvling up slower. Otherwise, it gets easy-mode way too fast. Money should increase more from wave to wave. One thing I particularly liked was the increased cost to lvl up skills as they got to higher lvls. Great job and I hope you keep releasing games of a similar quality.
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