(based on version 0.1.0) I like you acknowledged Progress Knight in the first screen. Game was addicting and there is some nice room for improvement as other suggested. After unlocking the appropriate skill, I did not get how to buy SPs with coins.

*** SPOILER: DO NOT READ ***
Really disappointed that the last path of ascension unlocks just useless bargaining skill at that level. I screamed and cursed several ancient gods and dropped the game. Then I calmed myself down realizing it is still 0.1.0. :))

Btw I found that solution cheap.