By far one of the most amazing Game Boy games here. Expecially the pixelart, it really captivated me.
Just the interface to assign the task is a bit confusing, but everything else is great.
It has an ending? I'm playing for some time now hahaha
Nope, looks like you ran into a bug! I thought I added protections against invalid inputs like that, but it's possible I missed some of the battles. Restarting the game and reloading your save should get the game back to normal, though you may need to redo the fight, depending on where exactly it glitched.