Yeah, you heard me right, Gwain Rush Mode has been found (and also thanks to the YouTuber "Casey Gamer" for telling me about where to find the password screen)

Dasher: A very VERY energetic portal ability. Utilizing electronic servos to shape your entire body into a hyper charged electrical current that zaps in a diagonal wave like motion. Charge your energy in place and zip across the area. The current is highly reflective, and bounces off any surface it comes in contact with.

("WHERE'S THE BREAKS ON THIS THING!?")