This demo is really good. It is very interesting to create loops and something like that. This is a great approach and might result in a fantastic game.

Does it make use of shaders?

Thanx for putting up the demo again
Downloading it now.

We need realtime blob portals! when you shoot one portal next to the other it blobs together to one portal! Like mercury!

We also need a shader of some sort so it doesn't 'snap' towards the new positions, but transitions really smooth. No real idea how to accomplish this though.

Cheers

Mine transitions seamless

You can go as slow as you want, and there will be no visible difference than if you were already there

Sorry for spamming your Post Josiah...

You could use motion blur to make a smooth transition. Before teleportation, the motionblur is on 100% and then slowly goes down to 0%.

Ich hätte noch einen Verbesserungsvorschlag:
Wenn man durch ein Portal geht sollte man auch so da durchfallen wie man reinguckt, also dass sich die Perspektive nicht ändert d.h.:
Wenn du durch ein Portal in der Wand gehst und es direkt angeschaut hast,
dann würdest du mit dem Gesicht nach unten durch das Portal an der Decke fallen.

You can make the test guy go into a loop!

Here's how (at least it works on my computer):

Create a portal at testguy's feet (duh)

Then create a portal on the wall behind him.

With a little strategy (and luck), testguy will warp to the new portal, run to the first one, warp to the second, run to the first, warp to the second, run to the first...

You can even race him!

And Re: Seamless transitions:

If you're on top of one of the balconies, about two squares from the floor will be the best place to spawn a start portal. Same thing on the ground (I think).

you can shoot through the portals just shoot at the edges of the portal and the shot comes out the other side. and it can even spawn another portal! i had hours of fun with it. you should hold a contest..post up the code and see who can make the craziest level...or the level that requires the most thought and planning of portals. would make a very interesting contest.