Cultivation Quest Prototype

That makes sense, I will add it to our todo list.
Tho we might be reworking this part of the game adding Alchemy instead.

There is Help section.

As far as I've been able to tell, there's really nothing to explain. 

The entirety of the gameplay is basically just a long-running pile of random number generators. Buy characters and wait until you have enough "power" to enter the next area. There's an extra RNG tossed in to inject delays into the power increase to make it feel like more of a game than a "while true x = x + 1" loop with pretty graphics.

Inventory items increase "Qi" and something unexplained called cultivation - but it seems like they're just there to reduce the time between the aforementioned artificial delays.

And discovering items, maps and characters is all up to randomness (with your "dice rolls" being limited by "Essence Stones."

So, nothing is explained because there's nothing here - it's a continuous dice roll loop (the resource gathering - which almost doesn't have any effect except in reaching that 100% completion target), combined with a couple manual dice roll loops (buying characters, which are entirely interchangeable except in reaching 100%, and "breakthroughs"), and an occasional "click next area".

If there's anything more to it than that, I never discovered it.