Thanks for trying it out, regardless!
I need to finish watching the video, after all this time, looking back at it is difficult. I feel embarrassed with some of the issues, the very lackluster writing (my native language is not English but still I think I've got better), and of course the length of it all. Definitely scoping issues when fitting all tasks required on a month, but part of what I wanted was to see how far I could go. Answer: not very far! But might still count as a vertical slice.
The rain issue is a cursed problem, I'd probably have to either disable the rain drop splashes for some maps or add some extra data for the engine to know when it hits a flat surface. Couldn't solve it at the time.
My main blocker however, for all this time I've been neglecting it, is the puzzle mechanics that don't fit well the perspective. If it was only stealth I could have compromised a bit but throwing bottles on cardinal directions feels bad. I know I need to either add proper diagonals or redo all maps in a less wonky perspective.