Assimilate (Flood-It for Mac OS 9) was posted on HN recently; did that inspire you? https://news.ycombinator.com/item?id=30176448
I was looking for logic games and found Flood in Simon Tatham's puzzles collection: https://www.chiark.greenend.org.uk/~sgtatham/puzzles/
> the original (which was apparently made 11 years ago)
I'm not sure what the true original is--I found a still-playable version[1] from 2006, from back in the brief heyday of Web Gadgets and personalized web portals[2].
[1] http://web.archive.org/web/20061112004207/http://www.labpixi...