Too damn laggy, cannot bare anymore. I will play on my android phone instead, it's very smooth there but sad that you have to get high rank to unlock purge and apocalypse game modes. Also no save system on mobile devices. :(
@thedarklordx
Constant innovation is too difficult to achieve even in the slightest margin for any business let alone for any amateur/freelance Flash developer. Therefore I would prefer to use the theory of "Continuous Improvement" or "Kaizen" in Japanese instead.
Please don't add upgrades to planes or ability to call for reinforcements during survival as these options are only for sissies who can't even survive past the 5th wave. Any player that has a calm and cool mind, patience, and the will to surpass expectations are the ones to be looked up to regardless of the difficulty of the game.
I finally obtained the hard badge after many tries... I started out lucky with getting the flashing shape some moments before the main theme started and hence accumulated a good combo early. Then I collected about 9 purple shapes which could be the most I ever got in a single run-through this hour whilst I kept collecting yellow shapes and moving my cursor directly horizontal back and forth across the screen whenever possible. Altogether I ended up with 7520716 points and 87% notes collected all thanks to the power of the purple shapes. It was a pleasure listening to the great soothing music while concentrating on collecting notes as it helps to calm the nerves by a notable margin. :-P
 "SAS: Zombie Assault 4"){kind=icon}
 "Thing-Thing Arena 2"){kind=icon}
 "Castaway Island TD"){kind=icon}
 "Freeway Fury"){kind=icon}
 "Rush Team Free FPS Multiplayers"){kind=icon}
 "SAS: Zombie Assault 3"){kind=icon}
 "Straw Hat Samurai"){kind=icon}
 "Steambirds: Survival"){kind=icon}
 "Music Catch 2"){kind=icon}