To what I experienced, if you enter the flow on its end, you don't get any push. If you enter the flow at begin, you get max push. So basically, to get the max push you need to slowly go down, and then enter the flow. It's a little frustrating, that's all. But again, it's a detail, not saying that it affects the game badly!
The GameDev.tv Game Jam 2023 - Free Course For All Submissions! » Entries » Balloonacy [Jam Version]