Thanks for the comments!
Eventually there will be testing, but not sure how/when. The project is quite large in scale and I'm not entirely sure how I'd manage such an endeavor. I'm open to ideas about that, as I'm sure there are others more experienced with it.
Also, I could use some feedback on a certain thing. There is currently an item swapping mechanic, but I'm not sure what the best functionality would be. Right now, if you hold SELECT + A, it will swap the item at the cursor position (in the menu) with the currently equipped item in slot A. Same with SELECT + B. (except with the B slot)
The limitation to that is you can only have 1 item on hotkey that can be assigned to either A or B. It is already quite effective and useful, but I feel perhaps there could be a better functionality. I've considered doing some kind of item cycle, but if anyone has a good idea they would like to share, I would love to hear them!