Thanks for playing!
The issue you mentioned is known, fix for it below :
Because its a buy/sell button we ended up having a bug where we check "fullInventory" before "isBuying" the way to get around it is to upgrade a sword once to get a free inventory slot so you can sell again. Sorry for the inconvenience the crunch was real. <3
We want to get all stats in each menu similar to the shop, but we have a wiki!
Delicious is a self-heal ability :) .