It just takes a long time for me to write the scenes and then render them. I'm finicky about making sure the dialogue isn't terrible and there's hundreds of renders per update.
I understand regarding the money situation. On Patreon, the next update will be v0.21 and will featuring Day 15. After that, I'm going to add animations for weeks 1 and 2 and release it as v0.22. That update will be on available on Itch/Steam, but won't include the Day 15 content. All new content is unlockable at the $3/5 USD tier level on Patreon.