I really enjoy the concept! It was a lot of fun. Also made me realize how little the position of wasd I remember from the screen prompts alone.
The game looks great, but I found that the vast majority of my time was spent staring at the gauge at the bottom. I didn't pay as much attention to the level, background, or the bar at the top. Also, I didn't feel very motivated to jump to higher levels. Either way, I think this is a neat game!