I think this has been my favorite concept of the whole jam so far. I was wondering what kind of "the rules change every turn" games I would see, and this one is great. I played one playthrough and got a score of 140.
The idea itself is really funny, and it works pretty well, but there are definitely some stuff that can be done to make it better. It felt like most of the time I was playing Doctor Mario, and it felt kind of slow. It might have been nice to implement a fast fall feature, but pressing down on the keyboard didn't seem like it made the pieces fall all that much faster (it might've moved them a step, but you had to keep tapping it; Tetris usually has a button to immediately drop a piece).
Also, it seemed like 2048 was practically a freebie; just mash and your board size shrinks considerably.
It would be neat to see this developed further -- improved pacing, improved balance, and possibly more games (though that might be hard to do, since practically everyone understands these three games already; it's hard to add in another game of this type without adding confusion because someone doesn't know how to play the game (though idk maybe a Panel de Pon or Candy Crush or Bejeweled or whatever wouldn't be too confusing, idk, actually you added 2048 so there's clearly some leeway as for the kind of games you can add so there's probably lots of ways to get creative with it)).