Platform Test is an indoor level, this is although a cool level, highly unfinished. It is one of the levels with 'test' in their names in the Return to Dark Castle Teaser.
The platforms on the left shift in and out, while the ones on the right are like the ones found in Shield 4, and are glitchy, so there's not always a path up to the top. The 2 switches change which platforms are ones you can stand on. The only exit is the top of the screen, which takes you to a random level, usually the Ante Chamber II.
- Top of Screen - Random level, most of the time Ante Chamber II.