Lol....what did i just play....was i a tree dude licking everything to death? hahaha. Well done and well put together! Everything feels very gameboy and the color pallet you used was perfect.
my only suggestion and it dose have to do with your glitchy audio, would be to add a mute audio option bound to key. Im not To familiar with GBstudio, but iv seen projects where several game options such as sound, size and other things are off to the side on a separate bar from the game. Not sure how to add this but something to consider!
Other then that nice little concept! kinda reminded me of the first Zelda game :)