Gamerules:
Picross is a picture logic puzzle in which cells in a grid must be colored or left blank according to numbers at the side of the grid to reveal a hidden picture. In this puzzle type, the numbers are a form of discrete tomography that measures how many unbroken lines of filled-in squares there are in any given row or column.
For example, a clue of "5 2 1" would mean there are sets of five, two, and one filled squares, in that order, with at least one blank square between successive groups.
A simple server based game built with Ring, Compojure, lib-noir and Hiccup. The project template was borrowed from Luminus.
$ git clone git@github.com:SniC/picross-clj.git
$ cd picross-clj
$ lein ring server
A browser window will open and you'll be able to play.
$ lein test
$ heroku create --stack cedar
$ git push heroku master
More, see Heroku.