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!