[wildlogic]

Ah, its a bug, thanks for pointing that out (you should be able to path to a square that was previously pathed but is currently empty), working on it now.

Yes, in this game you lay "pipes" from "depots", and must fill the entire grid with pipes.

Thanks for the feedback, adding some text with the basic rules now.

I initially had the first "tutorial" level a 4x4 grid with a [3] in each corner, but the 4x4 levels were trivial and I removed them.