Interesting to see two versions of Dicetris, and the different approaches they take. This one plays more like a topdown (rather than falling) version of Tetris, with the main mechanic still being clearing lines by filling them, while the other one made up its own mechanics and rules.
I think it works well; however, the dice roll feels more like something that's there to fit the theme as it's kind of a hindrance to the gameplay. It's kind of like if you were playing Tetris and after every block you had to roll to see which piece you'd get. I think having just a box with the next RNG-determined block would honestly serve the play better (but I guess it wouldn't fit the theme as much otherwise, so oh well).