I beat the game last night. I really enjoyed it. def plays like a mega man style game. I liked the fact that there are some minor rpg elements, but doesn't overwhelm you. To many of these new "retro" style games, are retro only in looks, but offer so many options it can be a bit overwhelming to someone who comes in thinking it will be a pick up and play type of game.
For example, Mercenary kings, on PSN. retro style game, plays like metal slub and metriodvania, But then it gives you tons and tons of customization options, and skill trees and such. I cant just pick it up and play it. I gotta spend 30 minutes doing all this option shit first. I don't want that in my retro games. Shovel knight has some minor RPG elements, but they are very small, and dont get in the way of the gameplay