Based on what you said, I bought the game. What I didn't realize was I paid $12 for 5 minutes of extra content! Why not just tell people that the "free" demo is 95% of Chapter One?! I am now not interested in the 4K, I am waiting for a substantial update!
I'm sorry if you don't feel you got your money's worth, but I made no claims about the size of available content in my initial response. As the game is still in development, content additions will vary in size, and the time it takes to play through it is player dependent.
If price is the primary concern then there are lower-cost options such as the $3 tier on my Patreon and SubscribeStar pages. That tier gains access to the game with a delay of 3 weeks after becoming available to the highest tier.
However, I still want anyone who pays for my content to enjoy their purchase. Feel free to refund the itch.io purchase and wait until further updates have been released before making your decision whether or not to purchase again. Please let me know if there is any issue with the refund process and I will personally communicate with itch.io support to resolve it.