I really wish I could see the heroes battling, bummer... still, this game was quite interesting. A complete version would be really nice! The visuals are solid, and the music might be a short loop, but more stuff with the same style would be really cool.
Just my opinion: using the mouse and having a bigger screen would be nice additions. Faster screen transitions would be a plus too. But I guess you were going after a Game Boy aesthetic, and if that's the case, you nailed it.
Also, did you use GBStudio/GBDK? I'm asking just out of curiosity 🙂