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.