I'm well familiar with Casper's games; I've 100%ed every single one of them, and I currently hold the speedrun world record on Tower of the Scorched Sea and third place on Cataractae's secret ending. Pent's Road Trip is something else though, and it's not helped by the art style making it basically impossible to guess where the hitbox is.
I did come back after complaining yesterday and almost 100%ed this one today, I just haven't managed to make it past the final challenge after the three secret stones yet. It is possible to learn the controls well enough to "git gud" at it, I just find it considerably less player-friendly than his other games and that makes it unfun for me to get to that point.
I respect Casper's work enough to want to give this one a fair shake but it's probably the only one of his games I will never want to replay again.