Just kind of uninteresting, a step above those handheld LCD games in complexity but nothing special. It's about 30 minutes long at most and is very easy.

To be fair, for 1990 this is one of the better licensed Game Boy games, the music composed by Michiru Yamane of Castlevania fame sounds quite good for the hardware, and the sprites look nice. Lets be honest though, these days you'll play it, move on and forget it existed. One for the completionists and those nostalgia driven, it's merely ok.