After loading a save file from version 0.2.1, I am unable to access the new content for Day 4. Instead, it directly skips to the ending credits, and after the credits finish, it returns to the main menu. I'm not sure if this is due to an issue with my actions or if it's a bug?
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So, here's what was happening: There is no Day 4 content in build 0.2.
When we released Luna Lake, Build 0.1 was released here first, and 0.2 released on Patreon. The differences between these builds was the cliff-hanger and end o day contents.
0.1 had a Cliff Hanger. Once Joshua sees you, there's a loud 'boom' and the game ends. 0.2, this doesn't happen, and instead you play through the whole of Joshua's route on Day 3. Once Day 3 ends, the credits starts.
Only build 0.3 started having Day 4 content. (And 0.3 is already available to download for the public, while Patrons have access to 0.7 and later this month, 0.8).
However never forget: If you play through older builds and load saves on newer ones, bugs can occur. When it happens, always play through the game again instead just to be sure.