I think I might have found a bug. I went northeast from the start, crossed the big stone bridge north, interacted with the big hole to go inside, and interacted with the little plant-like creature inside. The creature moved a few spaces to the right, then the game seems to have frozen.
Viewing post in Pico (Dream Diary Jam 5) comments
I think there are some bugs in the fish switching too. Switching directly from fish to pottomorph sometimes keeps the fish movement speed, and if I keep using items underwater I seem to sometimes end up as the slow fish-on-land instead of the underwater fish. None of this seems to stop the game from working, though.