This was the first PlayStation game that actually required the Dual Shock Analog Controller because players needed the analog sticks for movement and action of the player character. The left analog stick is for movements while the right analog stick performs an action with a Gadget.
The music playing during the first cut scene of the game is the same back round music for the level "Crabby Beach".
The European version of the game disables controller input on the main menu if it detects itself to be a copy. The player may only skip the intro and view the title screen. The European version only recognizes the game to not be a copy if it is being played on an original PlayStation from the PAL region. This unfortunately prevents the European version from being played on a PlayStation 2 or 3 due to the software emulation setting off this measure.
Despite the later release date, the European version is likely an earlier build than the US version, as it is slightly less polished and bears some similarities to the demo.
In the Japanese version, cutscenes can only be skipped with Start. In the international versions, cutscenes can be skipped with Start, X, or O.