I tried the demo. I didn't find the controls confusing (I played with a controller), hardest part was just remembering what button did what, and it's a very stylish game with a lot of room for stylish gameplay - for example, where I'd be likely to just run over enemies, a better player may roll up, do a 360 spin to knock them back, then charge up an attack and lunge at them. The hardest part of what I played in the demo was that there are areas where you can fall to your death, and forgetting to hit the wall climb button (or accidentally letting go of it mid-wall) will cause you to fall to your death. But I can see it becoming more challenging later on, with more obstacles to navigate, more complicated platforming, and tougher fights.

Give the demo on Steam a try. It's pretty short, but should give you a decent feel for the game.

I've tried playing it and had fun most of the time, though I gave up near the end since some of the controlls are a kind of hit or miss thing. So they work sometimes but not always, which gets annoying if you need them to work several times in a row. This led me to give up on the game in the end since I got stuck.

Here's my review. I was definitely one of those people who really couldn't bear the controls.