It's a good game, I'd be lying if I said I didn't enjoy it, but at the same time, it could be better.
The movement speed makes going through stages a chore, and I found myself double tapping the directional pad a bit just to see if there was any run command (there wasn't), and the combat gets same-y after a while, no combos and no throws, and it's easy to just line up all of the enemies and hold down the punch key to mow them all down at once. I understand the aesthetic decision, but that doesn't mean you should limit control options just to fit that 80's Game Boy monochromatic experience. This could be me, but I also find that some of my hits didn't register when they should, especially with the kicking.
Either way, I'm hoping this gets expanded upon, maybe a Game Boy Color version with added balances and features?