I'm not good at this game!
I think a slower timer would be helpful for actually being able to figure out which pieces to send where. Maybe even get rid of the timer altogether in puzzle mode.
Also I can't see the entire game at once on my screen (1280×800 IIRC), even in full-screen mode; part of the score is cut off, as are the sides of the leftmost and rightmost players in frenzy mode. (Also no pause button?)