The $2 tier will get you the game, if you want secret codes, go a little further and would like to help us out that's the $10 tier :)
Viewing post in The Ramen Prince / Ramen no Oujisama [EVN, Dating, 18+] comments
The demo version used to only have 3 complete routes, but the free version that replaced this (what you're playing now) is several versions earlier than the latest version for patrons. There are 11 character routes already available with the big differences , I think,still under WIP in the free version was part of The Genius Chef's V3 route and part of the secret route.