If you read Hapka's description of Pohatu using the mask of speed, I'd argue he's moving much faster than a car:
"The desert landscape passed in a yellowish blur, all details obscured by the Toa's immense speed. After a moment, the yellowish blur shifted into a brown one punctuated by flashes of green, and then quickly grew paler again until all Pohatu could see around him was white."
I'd be surprised if this project got taken down because its relatively inoffensive compared to the other stuff they've let slip by:
- Legend of Mata Nui remake: An actual product Lego decommissioned, now available freely (and open source, I believe?) to anyone interested.
- Wall of History: Literally all the Bionicle novels Lego owns available for free online.
- BioMedia Project: These guys are usually pretty good with keeping within copyright law (and they've had discussions with TLG who have basically said as long as you're not using our logo for anything or looking affiliated with us we're cool) but they've recently started uploading a bunch of content like retail games and the movies that's way more questionable.
So if Lego takes action against this just because it's high quality, I'd be a bit cheesed at how hypocritical it is of them when plenty of actual copyright infringing stuff is getting a blind eye.
Only potential issue I can genuinely see them having with it is they might not like a "violent" game (even though it frankly looks no more violent than Heroes or the TT games, the much more serious tone might alarm them) being associated with their product.