Shockman is a ripoff of Rockman which is known as Megaman in American. Or at least that's where I think they got the name from.
It does play a lot like the Megaman games on NES. These levels are actually good.
The reason I hate the game is because of these side-scrolling space-shooter levels. They're way too hard, and I got stuck on the very first one. I didn't use co-op (cool feature by the way) so that might be the reason.