The game is a faithful adaptation of the Bionicle children's novel of the same name.
Nokama is injured by the scorpion-like tail of the Rahi Nui. Only the tail of the beast can be seen, however this is the only visual representation of the character in the entirety of the Bionicle multimedia franchise.
The Ash Bear is represented by the "Makuta Nui" model, a LEGO figure which could be built out of three different Bionicle sets. Although the Makuta Nui is a wholly separate entity from the Ash Bears, the game developers used it as a stand-in because there exists no actual Ash Bear LEGO model.
In the game, the Bohrok creatures are operated by worms instead of their usual Krana. Bionicle story writer Greg Farshtey held a contest on the BZPower.com forums for the fans to come up with theories as to why this is. The winner entry, a short story titled 'Protection' by Bionicle fan InnerRayg, was later accepted into official canon.