Things I liked:
This idea is genius, plain and simple. There's just the right number of layers to create an interesting puzzle without it becoming completely impossible, and the whole thing is so simple to grasp yet so hard to master. The simple, clean aesthetic helped give focus to your smart idea, and although at first I was sad there was no music, I realized that it definitely would have been incredibly grating as I kept playing--the sound design works on its own. Your puzzle design was interesting and escalated nicely in complexity; I particularly like how the standard position of the arrow keys opened up a whole set of challenges involving moving in the wrong direction.
Potential areas for improvement:
This is where I think it's important to separate the objective quality of the game from my subjective experience. I don't like making finicky, small, precise movements in games, or in real life for that matter. And this game is entirely based around them. So no matter how much I can recognize the brilliance of the idea, the intelligence of the execution and puzzle design, the beauty of the simple aesthetic, I can get over my deep frustration that ultimately made me rage quit the game. But I don't really see any way to change this without fundamentally altering the game beyond recognition. My only piece of real, concrete feedback would be to make the esc key less punishing-- it's just too much in an already brutally hard game.
Overall:
I guess what I'm trying to say here is that I think this game is basically perfect, even though it isn't really my thing. I hope that lots of other people will find this game and have fun with it, and I'm super excited to see what you'll make in future game jams!
(excuse my self-indulgence, I had a lot of thoughts that I needed to get down)