The songs were decidedly worse than SCGM2 and I feel like the song had less bearing on what keys I was pressing than before. It is a mediocre sequel at best.
The physics are more than a little wonky. I moved the triangle by a milimeter on screen and it changes the angle of the deflection by 45 deg or more. Also, the ball will sometimes just bounce back randomly.
The level numbers/distance from the center have absolutely no relation to how difficult they are. I suggest coming up with some system to make the outer levels be harder than the inner levels.
For those people that complain that the game is too long... stop playing the game
Seriously, don't complain when the developers give you more than you want.