I've seen videos of soft body tetris simulations which look quite cool, it's even cooler to play something like it! The block stacking aspect is engaging and it's a joy to see the little squishy blocks spinning and sliding around. I will say I found myself using the rotations almost exclusively, with very little directional movement, but that may have been the intended way so I can't speak for or against it.
Sometimes a block would get stuck in a weird position due to my own bad planning, but it was super satisfying when it finally registered and two lines would clear up at once, so in a way it's a very forgiving game. I also love the little blushing and spiral eyes the character in the jar gets as it fills up, it's straight up adorable!
Kink-wise it feels like it appeals to people who like slimy stuff, and being submerged in fluids which is not on the top of my list, but is definitely on my list somewhere, so I think I get what kind of appeal it went for, and it captured it in a way that's more stealthy than most.
Also, Maybe I'm unaware on the nuances of making this sort of soft body physics work, but it feels really impressive to make something that works well with them since it can be a pain to direct them to do what you want them to, props for making it work as the main gameplay element!
Solid game, short and sweet, and cute characters, love it ^^