This game mechanic definitely grew on me. At first I didn't like it but it became fun scrambling to find the keys on my keyboard. That being said, some of the keys did not show up (they were empty brackets). Also, I think the keys ui should be bigger and placed toward the bottom of the screen. It was really hard to read them. Also, I think the camera should be pulled back more to see more of the level. Anyways, fun game! You should definitely add a cover image and some screenshots though!