Cute art, and as someone who's played a lot of Tetris, I love to see a spin on Tetris.
Flappy bird was cool, although you can spam the jump key to end up way in the sky since there doesn't appear to be a barrier on top.
Unfortunately the Tetris implementation is a bit unpleasant to play, at first I was very confused as to why I was misdropping pieces so often, and well the first thing that caught my eye, is that your L and J pieces are inverted between the the play field and the next preview, leading your peripheral vision to constantly make the wrong piece placement if you're building ahead.

On the L and J's, the rotation pivot is really odd, it never really rotates the way I expect it to, and lastly, there isn't any DAS, meaning that holding the key down doesn't move your piece.
Also going back to Tetris after completing the familiar event, causes the familiar win dialogue to play again.
Overall I do really like the art, I just wish the Tetris implementation was a bit more polished, though these jam timelines are quite tough, so it's understandable.
Here's a frankentetrisallclear!
