Not great. Would be better if you could mute it. The rewards are very hit and miss, which gets very annoying. Also, the collision detection with the sword seems to be a bit off.
The controls are terrible. Moving a unit with left click is simply stupid. It causes you to move units by accident when you try choose a different unit.
This is what happens when games aren't beta tested before they're released, bad controls and boring!
For anyone commenting that this game is too hard or too much offscreen damage, you're just a crappy player and should try an easier game. The only offscreen damage was the bread that falls from the top, if you stand under a rock then you get an extra moment to evade. The eye lasers are your biggest threat, but did any of those whiners notice that first the eye laser shoots from the top, then the bottom? Of course not, crappy players don't know how to make strategies.
This game is fun and easy. Took me less than thirty minutes to get every badge.
 "Enigmata"){kind=icon}
 "Mechanical Commando"){kind=icon}
 "Amorphous+"){kind=icon}
 "Kongai"){kind=icon}
 "Drone Wars"){kind=icon}
 "Castle Crashing \"The Beard\""){kind=icon}