I'm going to keep playing, so I haven't rated it yet -- but my first impressions are -- "Hey, is this the developer of Starseed Pilgrim? That's a neat game that's also extremely chaotic that I never understood. Hey, is that the player character from Cave Story drowning in the sea? Hey, wait, this game has so much polish and is so well made for a game jam game. I'm not even sure what's happening but the presentation is the best I've seen so far out of any game here. Wait, this only has 7 ratings and no comments so far? What?"
Will play more before rating, but like Starseed Pilgrim, I'm not 100% confident yet that I'm going to understand what's happening.
Edit: OK, I understand now, get to the exits at the top of the screen while water slowly fills and you have to solve rock moving puzzles to do so. Again, presentation is absolutely fantastic, at least until the game starts lagging. I guess basically if the water fills up all the way and the game starts lagging, it's pretty much time to reset and try again, because you're certainly not moving those rocks anyway.
I've never played a game quite like this, so besides some minor issues with lag, it's really cool.