Why is the background the Toa Metru, when this game takes place on Mata Nui?

This game wasn't released on Wii, but it was on PC. Could you change that?

I want to learn this game for the 12 hour challenge next week. Is there anything I should know going into it, or anything that would help me learn?

There's a Bionicle Speedrunning discord - it's pretty much just used for Bionicle Heroes at the moment, but this game could join if you would like.