I've always loved this amazing game because so much effort went into it and it gave me a very interesting gaming experience. I used to play around with the game a bit back then, and looking back at the game from 5 years ago, nothing has really changed, and I think it deserves a few tweaks.
Instead of using mocap animations for Pipe Head, I recommend creating your own animations or hiring an animator to make the game more engaging. I have a suggestion to expand the terrain and add more buildings (more features) to the map, make revisions, or at least try to create more content for the game, such as chapters, cutscenes, or new difficulty levels, assuming the game isn't an abandoned project.