Played about one and a half levels. I think it has potential, but the controls feel very slow and clunky to me, and the visual effect makes it very hard to read the hint text.

To the issue of the controls, it's somewhat painful to have to wait through the walking animation to press the next key, especially when it's the key you're already pressing. And with the walking speed being as slow as it is, that means waiting a full second (if I timed it right) after you press a key before another key will register. If you're even a little early, your press is ignored. This makes movement feel very slow and awkward, especially when you're going down a long hallway where all you're doing is pressing one key over and over every second for 10-15 seconds or so.