It's an interesting idea and really nicely made sprites. It seems to be a bit buggy as it often doesn't seem to accept the right response correctly making the fail sound and taking damage (or at least that's my impression). I also managed to get locked in "combat" while looking around with no ghost around, resulting in the hamster moving on with no more ghosts spawning. I can't seem to finish the game even in multiple attempts.
The music is nice even if a bit repetitive. It's not exactly a game you would find in on a GameBoy on it's own, but could easily be a stage or mode on a bigger game.
Solid entry.