These are some rough estimates with 3 trials each. I set a distance with landmarks and time how long it takes for Yooka to cross that distance as one trial. I use walking as a base speed and try and see how other methods of movement compare to walking. I used Capitol Cashino walkways as a test range because they are long, flat, and have lines on the floor for landmarks. I used the fountain for the swimming stuff and tried going in a full circle around the perimeter where the distance of walking and swimming will not vary too much. I used the slide in the entrance of the house of cards as it has a walk way next to it that can share the same landmarks. I am not 100% sure if different slides have different speeds. I do not account for acceleration and start the timer when I am already at top speed. Let me know if you disagree with any of it.

Continuous reptiles rushes: 3.0x Buddy bubble while air attacking: 2.0x Rolling: 1.8x Flying: 1.8x Fast sliding: 1.4x Buddy Bubble walking: 1.2x Continuous air attacking: 1.2x Gliding: 1.0x Passive sliding: 1.0x Swimming while spamming bubbles: 1.0x Surface swimming 0.9x Underwater swimming 0.6x