Cool twist on Tetris-like mechanics!
I was able to get a decent score on the leaderboard, but after playing the game for a while, I have some thoughts on the mechanics. I'm not sure if there was something that I missed, but I feel like there are blocks and lines that are just "useless"? I don't think it's possible to score by making a square with a T-shape line or the cross line for example, so are they just there to fill up the space so you can get rid of them through combos later? I have found that the combos outlined in the tutorials are the only viable strategy to play.
I also think it may suffer a bit from being too complex? Not sure about that. After playing for a bit I also find out you can actually rotate the whole arena for the blocks to fall another direction lol. That adds a whole other dimension of complexity, which it's neither a good or a bad thing, but may make it feels a bit intimidating.
Overall, I still think it's a good project. Good job!