Ussage is simple: fire with the portal gun to the desired locations to opend first and second portals. Now, the wormhole is created between them. You can enter it, or close it down. This mod tries to ...

Spawn a portal gun in the spawn menu. Left/Right-click to shoot portals. Reload to remove all portals. To pick up an item, press E. If your portals don't look right on the other side, you need to ...