Show HN: Koro-koro – a pathing puzzle game

Not doing so well lately, but I managed to hack out this little puzzle game. I've spent a lot of time thinking about simple games appealing to a wide audience that can be played with no more than paper and pencil, and haven't come up with that many great ideas, but I think this one checks out. Feedback welcome! Not that I think I can sell this to the NYT for their puzzle section, but interested in ideas monetizing this outside of adwords. Thanks for looking.

It is not obvious what you're supposed to do.

From just trying things randomly, I think the objective is to get each numbered square to 'claim' or 'path into' as many empty squares as the number shows. That is, if you see a red square that shows a 3 on it, you need to click on that red square, then click on an adjacent square to 'claim' it for that red square, then click on a square adjacent to the one you just clicked to 'claim' it as well, and so on.

Your options, from worst to best: - add a tutorial (everybody hates tutorials) - add some concise text to the bottom of every page that explains the objective and how to play - find a theme that makes the objective and how to play intuitive

Other feedbacK: - You absolutely need to show which square is selected (if any). - There's either a bug or some condition for play that I don't understand, but you can't try to occupy a square more than once even if the square is empty because a previous attempt to occupy it was canceled/reverted.

Sorry, I'll add some instructions, the game is to lay pipes from the depots to fill the entire grid.