Hints for the puzzles are given incrementally and all the spoilers are behind a big red button so you don't accidentally see them. This is not a walkthrough but a more granular hint system giving the final answer in the end, still.
This low spoiler guide for Gibbous is hosted at Nice Game Hints as building it directly here would be too much work.

https://www.nicegamehints.com/guide/gibbous/