Eww, no, please remove the Tower of Hanoi level, for the love of god, no, I have nightmares about that puzzle. Even knowing how to do it, its obnixiously tedius.
My complaint is a fair one, the same I seem to have with every tetris-like game thats not official. The random number generator. In real tetris, you'd never get 5 of the exact same s block in a row, the peices it gives you should be in a more balanced spread.
 "Hello Worlds!"){kind=icon}
 "Take Something Literally"){kind=icon}
 "Run Elephant Run"){kind=icon}
 "Hardball Frenzy"){kind=icon}
 "Sushi Cat"){kind=icon}
 "MegaDrill"){kind=icon}
 "Little Wheel"){kind=icon}
 "Shape Switcher"){kind=icon}
 "Lock-n-Roll"){kind=icon}
 "Fat Slice"){kind=icon}
 "Multitask"){kind=icon}
 "Red Remover"){kind=icon}
 "Newgrounds Rumble"){kind=icon}
 "Kingdom of The Wind"){kind=icon}
 "99 Bricks"){kind=icon}
 "The Last Canopy"){kind=icon}