My favorite sections of the maze were the ones where you have to look ahead to see which path is forward, but overall it was a bit too long.
The boss fight was cool; conjuring walls onto it to hurt it was a clever extension of the mechanics.
The music isn't great. It could use some bass. Although, that scare chord in the boss song is actually pretty cool. Keep up the good work; practice makes perfect!
Is the main character supposed to be a rapidly flashing red and green light? That's bad! That's really bad! That's the first thing you should fix! Putting aside the photosensitivity concerns, it is ugly and it hurts my eyes. I spent a significant portion of time literally covering my screen with my hand.
Congratulations on the submission!