My main issue with the game is the height of it. I can't see all the screen on my laptop. Though thats mainly my problem here..
I would afree with cybersaint that adding some sort of upgrades and waves to break things up a bit.
Other than that I think the game is pretty good.
 "Abbadon4's Pevic Thrust Maneuver"){kind=icon}
 "SkyDie!"){kind=icon}
 "Cargo Bridge"){kind=icon}
 "Feed the Ducks: Idle Hands"){kind=icon}
 "Battalion: Arena Beta"){kind=icon}
 "Learn to Fly"){kind=icon}
 "Awalters Chat Game"){kind=icon}
 "Remnants of Skystone Beta"){kind=icon}
 "Desktop TD Pro"){kind=icon}
 "Madness Reaction Time"){kind=icon}
 "Forever Winning"){kind=icon}
 "Perfect Balance: Playground"){kind=icon}
 "Blackboard Squash"){kind=icon}
 "Music Catch 2"){kind=icon}
 "Remnants of Skystone Alpha"){kind=icon}