I enjoyed my time with this game - I think the cohesiveness of the visuals and the SFX was the strongest point here, everything felt well-built and the theme was consistent. I struggled a little bit to understand exactly what I was doing, I may have been overthinking the mechanics of the walls, with the red glow turning into the green glow. And I wasn't able to figure out how to turn, although I think it's okay to have this game without a turn mechanic, since you can use the walls to reverse course.
I think the enemy AI was good, I never felt like it was being unfair, but also didn't feel like it was too easy to just figure out how they were programmed. Not necessarily the most original concept of all time, but that is balanced out by good execution on the concept, with a very cohesive style throughout. Great work!