Lots of potential, good job! I liked the ambience and style.
I didn't like the controls, just felt so unintuitive to me. Maybe I'm just used to the other scheme of "I'm walking forward and I rotate my heading with left/right".
I wish you could have had a little transition to what was being activated. I reached the section where I assumed I needed to bring all 4 blocks but didn't know what each switch did and couldn't figure out how to bring the last 2 from the start without lots of trial and error.
Cheers!