This actually turned out surprisingly fun, and im actually pretty interested in how the water works. After I got the hang of the controls it also turned into a bit of a strategy, and I can see this being a pretty fun coop experience.
Only really 2 problems I had from me, the sound at first was a kinda loud, bit of a warning would have been nice, and that getting stuck in a block I created actually stopped me from drowning since it removed the water. Using this strategy I managed a total of 437 seconds till I ran out of stuff.
Actually a pretty neat lil game, gj!