I have put together an autosplitter for Neon White:
https://github.com/crashb/neon-white-autosplitter

The autosplitter works with all of the Level Rushes. For details, please see the autosplitter's readme file.

For some weird reason when i've used the autosplitter it has stopped the run when i reached the final boss battle and not continued to take time for the final battle against neon green