How do you do the Seagull Jump in WhiteHat's run? I'm confused about the order of inputs and what frames you need to do it on.

Took me about two hours to smash the high scores there but it was fun. My time is 2m 22s for Sky Town. If I submit a run it will be taken with my phone at the arcade. What strategies can I use to get better? Should I play with the arcade version or PC version?