It's like a really tough arcadey blend between Arcade Shinobi, Elevator Action, Bionic Commando, and Hotline Miami.
I don't even like any of those games (aside from Hotline Miami) on their own really, but in combination here it's a lot of fun breaking down each stage like a puzzle and trying to figure out the best route. It's surprisingly tough and unforgiving, even on normal, but I appreciate that.