I like it especially the last area, at first glance I thought it is a bug then I realize it's a good design of the level, the way you use dark and lines are very smart. It feels great when I reach the portal. I hope if I can stay a little long in the level just wandering around.
Though the game gives me a little dizziness lol.
I think if each enemy can have a pattern of likeness(or weakness?), or if they give some hint on their weakness, it would be more helpful and feels more strategy. Currently I just randomly guess and it feels a little frustrating.