It's crazy how a simple choice in music can totally reframe a game. I was half expecting some philosophical musings about breaking free from your one-dimensional existence (the open 2D area at the end was a nice thematic touch). To echo some other comments I'd agree that the biggest thing this game needs is the ability to see when the red squares are inactive, because a lot of my deaths could be chalked up to moving forward and all of a sudden a red square is in my path before I have time to react. Aside from that, good job.