Just a simple idea: a refill which, when collected, gives Madeline less gravity until she dashes, at which point normal gravity resumes. I'm thinking of the outside segments in Low-G Gravity (SJ) as a reference point for the low-gravity state. Alternatively, the altered gravity value could be typed in in Loenn; that way, mappers could also create no-gravity or extra-gravity refills with the same entity if desired.