I made tetris. It's pretty cool.
It contains all 7 blocks, gravity, rotating blocks and line clearing.
It doesn't quite yet have any way to lose, hold blocks, or see the next block coming. Yes, I could easily add these, but no, I don't really want to.

(Thanks to NoahK for helping with displaying the video)
I originally made this on a school TI84+CE, but I lost it, so I made it on my TI83+, also making it faster. I hope it's optimized enough to be playable on a TI83+, I think it is, but just barely.

I'm not sure why the gif isn't loading... (Fixed now)

Glad to see you got the GIF fixed.

This looks like a really smooth and fast implementation of Tetris in monochrome BASIC, nice work!
Would love to see at least one lookahead piece, even if there isn't swapping/holding.

Maybe saving the (high)score to a custom named list, so you can try to beat your record?

This is very cool and it runs fast!

I think I might add a lookahead piece in the future, but first I want to work on other projects that I had ideas for.

This game is now available for download in the Cemetech archives

Looks good, thanks for sharing! A high score list and table is a great idea, and I agree on at least one-piece lookahead.