Due to the HUD in the demo, it seems this is a demo of the v0.16 Beta release of the game. It is said to come from the PS1 CD Sampler Pack.
This demo is different to the PS1 demo. It seems to connect parts of the levels in the final version:
- Island 1, Level 4: The Tumbling Dantini - Part 1
- Island 3, Level 5: Leap of Faith - Part 1
- Island 3, Guardian 1: The Deadly Tank of Neptuna - Part 2
- Island 1, Level 2: Underground Overground - Part 2
- Island 2, Secret 2: Ice Bridge for Eternity - Part 1
- Island 4, Level 1: The Tower of Power - Part 4