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Non-Euclidean

Also where did you get the campanion cubes in the picture

You did good, but it's super buggy and I can see everything at once, so... basicly im trying to say what KyloX said.

I know this is your first hammer map, but please, keep testing maps to yourself. Hardly anyone likes sandbox maps in Portal 2.

Plus, if you gonna start working with linked_portal_door's, try to fix the issue of "more then 4 visible portals", as it causes some really bad glitches (which I know you are aware of).

Good luck and again, keep testing maps to yourself.