I found two more crashes
For the first one, If I am right, the crash happened when I hit the boss right before it was going to do it's attack.
Edit: I just found another bug where trying to sell golden teeth, and potentially other 4 slot objects, causes the part of the inventory where stuff is sold to stay on screen, and can make game harder to play.
The boss one is pretty confusing to me, I guess I'll just have to trawl through until I find any potential problems.
Ah yup, I have managed to get the bugs for the inventory stuff too, that mostly just needs cleaning up and a rewrite of logic to do with how the items are stored as I think there are errors with how I wrote some shapes. I didn't test them enough when developing it, but will fix it at some point. I recommend trying to avoid the S shaped items or odd shapes (like the teeth) at the moment when possible because of this.