Yeah, that's definitely been most people's biggest struggle it seems. You can move quickly to the Slope, then bonk on it and immediately go in the opposite direction, which will cause the player to make a flip.
With the very small playtesting we got in before we needed to submit, we found that that could stump people, and the geysers/launch pads could be a bit much, which is why we chose to add the "skip level" button lol
I'm glad that you enjoyed playing the game overall though, and we appreciate the feedback!