Really enjoyed playing this, it was really puzzling and tough to find your way around, which tied really well with the theme. The light effect was nice and the visuals were alright.

I would suggest: make the background change with each room to indicate that you're in a different room, and make the character slide less (i.e. increase the "friction"), as it makes the platforming a bit difficult.

Nice job man!

Oh i was struggling in the first level, and then cui boy advanced! and then another level! it was too hard for me to see the platforms and get the right portal to continue. And if you hold jump in a wall you can climb it, even the roof. o/