I wasn't able to get very far but I enjoyed what I got to see. I liked the multiple paths I could take especially since it meant a wrong move didn't mean it was over right away.
Having to switch my right hand from the arrow keys to my mouse was a bit awkward though especially in a game where you have to restart a lot as you learn the level. I saw that S was mapped to down as well, but up wasn't mapped to W, if WASD keys were also a control option, having to switch to the mouse might have been a bit easier as I can keep my hands on both. Either that or using a key that's close to the arrows so I can restart right away.