Circular Synapse v0.61
A well-built 5D map that's seriously confusing until you get the hang of it... and then carnage gets absurd. Don't stay on the hill for too long... it's very, very dangerous. Nice use of the portals concept. Update darkens up the outside stairways, and reshapes the portals. Overall, this is a very playable map.
Levels in map "Circular Synapse-v.0.6.1":
The Circular Synapse