Very good, good theme exploration and rough art style.
Had some issues with the screen resolution.
Interesting concept, it would be cool to see this polished and made into a full game :D
I love the theming & art direction, but I think it would be cool if the tetris blocks were themed to fit the into the wild west a bit more :P
There were a couple of bugs though - blocks floating off into the aether, blocks freezing in place sometimes if you try and change block height inside the scoring area, etc...
Overall, fantastic work for 48 hours!