One Portal test chamber

Build a one-level first-person game in the spirit of Portal: a single test chamber solved with a portal gun.

Build

• Three.js or similar, full-window. Click to lock the mouse, then use the mouse to look, WASD to move and space to jump. Left click fires a blue portal; right click fires an orange one.
• Portals stick only to white wall panels and fizzle on dark metal. Firing a portal of the same color again moves it.
• The level is one room. The exit door is on a ledge too high to jump to, and the wall on that ledge has a white panel. To solve it, put one portal near you and the other on the ledge, walk through, and reach the door. A "Chamber complete" card then appears with a restart button.
• Portals are real windows. Looking into one shows a live view out of the other, and the perspective shifts correctly as you move.
• Going through is seamless: you come out of the other portal facing the right way, with no flash, jump or flicker as you cross.
• Until the first click, a demo plays on a loop with both portals already placed: the camera walks into one and comes out of the other.
• A clean, finished look: white panels with seams, gray metal, glowing blue and orange portal rims, soft shadows.

Judged at a glance

• Look into a portal: you see the other side, and it shifts correctly as you move.
• Step through: you come out of the other portal facing the right way, with no glitch.
• The chamber can be solved and ends on the completion card.