I don't understand the roadmap; in the $9 version that I have, the game ends after day 1. No mechanics or nothing. just wake up, walk around, find some clothes, go to sleep and game over.
There is only 0.1 released so far. The game is brand new and that was the first release, so the road map of purchase power is less relevant at this exact moment. I believe they said it is pay-per-update, so I recommend waiting until the prologue is fully completed at the minimum before paying. The free version will have all the same content, just an update behind and with some censoring.