Portal mechanic + CPU rasterizer, in one HTML file

• W, A, S, D to move
• Space, shift to fly up and down
• Mouse to look around, left / right click to shoot the orange / blue portal
• P to change controlling object
• I, K, J, L to move controlling object
• U, O to move controlling object up and down
• B, N, M to rotate controlling object around the X, Y, Z world axis
• When looking at companion cube, E to pick it up
• When holding the companion cube, E again to throw it
• When holding the companion cube, F to let go of it
• When not holding the companion cube, F to teleport it in front of you
• G to toggle gravity for the companion cube

Wall and floor texture: sketchfab
Companion cube texture: deviantart
Wheatly cube texture: supercoloring