A setting, gameplay loop and extremely likeable main character (for me at least) all brimming with originality made my experience with flip-flopping about everywhere an overall very pleasant one. For me, the main crux of the game mechanics was thankfully very quick to learn and never really outstayed its welcome - flying about with superhero-like gravity powers is a dream that so many people have, is it not? The adventure had good moments too with a tale that was intriguing albeit rather confusing in the final acts. Just a few more quality-of-life improvements like a quick restart option for challenge runs, and maybe upping the obstacle variety would have made it even more intriguing for me, yet I am satisfied with it as is. I'd say the platinum run isn't an arduous task either, and if you level up with them early then the remaining game will become only more manageable later.
Good stuff, I see why it's a beloved cult game.