itch.io

Im assuming you were able to reproduce it?

Awesome proof of concept. My one gripe is that you have to be right next to the portal to interact with it, which, unless you use this as a layer of puzzling for your levels (maybe some portal frames have a timer where the portal will close after "x" amount of time so the distance you can interact with portals restricts which you can use), is really just an annoying aspect. As development furthers and you get a fully fledged game I would suggest coming up with more mechanics/ interact-able items such as the launchers and switches in Portal.  In addition you should offer red hearings such as portals that are accessible but useless for the solution of the puzzle, in order to increase difficulty. This is all assuming you are going for a puzzling heavy game, however if you are going for more of an artistic, adventure, or narrative game i would suggest in addition to either a story or a narrative theme (etc) adding some simple platforming and increasing the jump height of the character, just to add some more exploration to the game. 

Managed to shift the angle of the world by standing halfway through the portal and then rotating it. Hard to explain exactly how to do it but you will know that you did it when you are popped back through to the opposite side you are on (as indicated by the model being moved and the sound que) when you rotate the portal.