While the game has CD audio data, it is referred to as a dummy in the filesystem. When played, it is revealed to be a background track from Rox.
In the European version's executable, there are logos for the companies Phoenix Games and Mere Mortals, which are loaded upon booting. However, two unused logos for Mud Duck Productions and Midas Interactive Entertainment also exist.
There is a some sort of relationship regarding the inclusion of those two logos, as there is a considerable overlap between PlayStation titles Midas and Phoenix Games published in Europe, while Mud Duck Productions managed to release some of the Midas-published titles in North America.
- Strangely, the European release has no music.
- While the Japanese version has five videos in the Tutorial mode, the European version has four. This is because the former uses two separate videos to explain the movement of the chips. The style of the videos is also largely different, with the original Japanese release using 3D animations, while the European release uses 2D animations.