Nice, none of the skills do anything, as they get 50X your speed, damage, health, exp growth, gold growth, et cetra. Even on easy.
The extra wealth, the extra exp, the auto heal do nothing at all, I dont think the bullets do anything either.
15/20 levels are accessible without logging in. After beating 3-starring those 15 levels, you have all the upgrades and can consider the game complete.
A bit too simple, a bit too short. Worth wasting a few minutes.
Needs hotkeys, and what's the deal with the online login crap? Shouldn't have to register for an external website to access full game content. Also, turrets should be smarter and more fluid when it comes to aiming.