Oh so the line clears aren't locked to discrete areas, that's nice to know. I don't think you really need a fullness indicator if that's the case. After suggesting larger boards I was playing it some more and noticed my framerate did start chugging when the board was really full so yeah, I don't think it can really get bigger. I've also noticed a couple fairly minor issues, neither of which significantly hampers the enjoyment really:
- When holding down to accelerate a piece, if the piece touches the wall it goes dark and you lose control.
- Rarely a pressure eruption will launch a piece into the death detection area and cause a game over. If this isn't intentional, you could fix it by only game overing if the piece spawn is blocked for an extended length of time. That would delay game overs in the normal case though, so it might not be worth it.
Oh and also. My cousin walked in on me when I was playing this game, and said "That character looks kind of familiar," and I said "That's odd, I'm pretty sure they're both original characters," and he said "I think that's the avatar for a tetris youtuber." So yeah, I guess you're famous.