Apparently this is a new driver which uses the open source headers and Linux kernel modules from nVidia’s proprietary drivers, and it doesn’t borrow very much from nouveau driver because that one has different names for things in their headers due to the clean room reverse engineering aspect of nouveau. Although I am not an expert on this so I could be wrong.
Since you brought it up, what is the difference there? Do you mean gameplay design as in the whole game is this way or as in this scene is not a level? (No I didn’t watch OP’s video.)