It's certainly a novel spin on Tetris, though I'm not sure I would actually consider it a Tetris variant outside of the piece shapes. The goal to stack things high rather than form complete & gapless lines kind of runs counter to the core concept of Tetris. Perhaps it would be more fitting to push the ridiculousness further and go full throttle in the parody direction, throwing in occasional non-block prop items like fish, seaweed, and chili peppers (that may roughly resemble Tetris block shapes but are slap-stick obviously not).
As others have also mentioned, the pace feels too slow. Either increasing the speed or the size of the pieces would probably remedy (or at least mitigate) this, though. The cement block is an interesting idea, and perhaps the game could add some other variant blocks to mix it up further if development continues.
Presentation-wise, the game is quite polished and has a good number of assets at that level of polish. Sound effects and BGM are actually nice but grow irritating due to the length of a round and its slow pace. That said, the lack of interactive diversity makes it feel rather bland and somewhat like a physics demo in a way. Despite the production value being there, I did not really "feel" much of anything while playing (apart from "physics is working"). If only it felt like more was happening, I would probably have liked to give the presentation 4 stars.
That said, it certainly is a very solid implementation of a novel idea. I didn't really "have fun" playing, but credit is due to the willingness to explore eccentric gameplay avenues. So kudos to that.
Overall, quite forgettable but also equally novel. Good show!