Swim up and not drown.
Use the board as a floatation device
Is the top of the room open?
if the exit is above, then the solution is clear
let the room flood and you will float up to it
solution solved

good news, we're rising directly to the tip top, because scrungy has only been eating gruel for years, he's lightweight
there's also no need to bring out your giant richard.

scrungy is now on the tip top, the outside world
Graft pumpkin to yourself so you have one hideous arm

there's no pumpkin.
besides, how would you even
carve it?
wonder where your head blood went

you ponder where the head blood went while also thinking about stabbing your eye out.
you decide not to do the latter.

oh there it is.
assinventory- sharpened half of a lockpick, covered in blood
- a plank of wood with scratches on it and a lockpick on the top
- keyring with key
- lifelike nose
- ladder
cranium inventory- the other half of the lockpick
edit - some note on how these panels are being made, even with using the same drawing of the character, it takes a while to get it the panel to the point which i like.
this can either be due to flash fricking up or a massive amount of commands at once (such as after a break).
i'll be skipping the occasional command to speed up the amount of updates i can make.
what will scrungy bingus do??