Tetris is a good base, and I do think the new mechanics are cool. Took me a while to figure out how they worked though, they feel pretty messy at first, and sometimes the tetris rules (like the selective gravity and tall & wide playfield) feel like they're working against them. It's neat though, I keep replaying it.
Also occasionally the game glitched and had me drop two pieces at a time which was pretty funny. (Sometimes on restart, sometimes when I used Roll. It only stopped when the game ended) Seen here:
(also why'd i have to turn into a tetris nerd last year i keep trying to do Spin moves aaa)