Looks great! Just started playing on my GB. The button mapping is the wrong way round in the browser though :) A and B should be swapped to match the B A layout of the GB :)
Viewing post in Forest of Fallen Knights comments
Yeah, the A button does interact but, to match a real game boy, A should be mapped to X and B should be mapped to Z, if that makes sense?
I had a look and GB Studio maps the buttons as you have it by default, I wonder why. Easy to get used to but it is a little confusing switching from playing in the browser to using a real GB.