Actually while talking about this tetris game... I noticed some pieces don't behave symmetrically. This isn't normally such a big deal, but when doing death mode + hide next, it can be frustrating since the pieces aren't consistently manipulatable.
For example, the I-piece needs only 2 columns of room to rotate on the right side of the screen, but 3 on the left.
Will rotate to vertical:
..........
......XXXX
....OOOO..
....OOOO..
....OOOO..
Won't rotate:
..........
XXXX......
..OOOO....
..OOOO....
..OOOO....
I'm sure this is just because the pivot-point is the 3rd square. But it still is annoying since you have to think asymmetrically :) The L-pieces also seem to have inconsistent behavior.
Anyway a minor complaint, but it would make those modes more doable :) As it is, the I-piece is INCREDIBLY annoying in death mode/hide next.