Can the gameboy file be emulator only? I don't own a gameboy anymore so i can't test out the controls. With sameboy?
Do note that just because it runs in accurate emulators (i.e. BGB, SameBoy, Emulicious) that doesn't necessarily guarantee hardware will play nice. During the development of my entry I encountered an issue that didn't pop up in BGB but resulted in graphics corruption in Emulicious + my GBC and a game freeze on my GBA SP. For that reason, I'd recommend testing in all three aforementioned emulators if you don't have access to original hardware and/or a flashcart.
Of course, you're always welcome to ask the folks in the GBDev Discord server for help with hardware testing.