Can't figure out how to clear the secret area in this world. I can get to it but can't get past the big jump with the wall overhead neither with artifacts nor with consumables.

Post any bug reports and feedback you have here (or in the discord server) and I will address it ASAP.

while most of them are straightforward what does "leave no stone or challenge untouched" mean?

There's a few songs on the official youtube upload of the OST that aren't on the purchasable soundtrack, which is kinda annoying. Any word on when they'll be added to it?

I'm really, really starting to hate this game. It's one thing not having healing items, the most basic thing in platformers, not drop from anything, including enemies, but having pixel perfect sections where you have to bounce on enemies above bottomless pits and unfair enemy placement is just plain ♥♥♥♥♥♥♥♥♥. Making the game piss easy on the first three worlds and then skyrocket the difficulty out of nowhere is bad design. That's not even mentioning the godawful boss fight against Belle...