Thanks for the answer) And now I have another bug for you.
My actions: start as sea creature; complete first level with 41 total nutrition by destroying some green blobs after the message "stage clear" (good job on the message and weakened whirlpools by the way, feels much better than forced whirlpools). As soon as i start second level (boss) I hit space to redesign my creature but instead I see title screen. I pick "continue" and instead of 1st boss I get into this abyssal empty level with nothing but darkness in all directions. Can't find player logs on windows, no idea where it is.
Edit: could not reproduce the bug by doing the same, might be a rare exception rather than stable error.