I really like it. It feels polished, it makes me want to keep playing and it's basically a High IQ tetris. Though I do admit i felt a bit lost on what exactly I'm supposed to do and how the game works, so a tutorial or some instructions/examples would do well.

Great work!

Controls for rotate and hard drop are flipped. And the game seems to just break in any case that isn't a fresh level from a fresh boot. So many different bugs in just a few minutes of play that I gave up. 

Playing the game makes me feel like a brainlet. I think you might have to streamline things more if you want the average player to enjoy this.

The core idea is intriguing though. I hope you will find a way to make it truly click. One thought did jump at me, maybe try giving a delay to completed rows disappearing? Like say, 3-5 player moves or something like that. So you can build a row to finish and move out of it instead of dying and it would give you an opportunity to grab some item that would go with the row.

pizza devs represent 

High IQ game, made my head hurt. Pretty fun.

There were a few times where the change mode function got jammed and I couldn't change it. I played a level without ever being able to change to tetris mode. And several times I started in knight mode, and couldn't change to tetris mode to let the first piece fall, so I had to restart.