SigNULL is an interesting and addictive logical "slide" maintained in a somewhat mystical, cybernetic climate. Although the creators funded only a dozen or so arrangements, they were highly differentiated in terms of both difficulties and implemented, unpredictable solutions ;-). Generally the game boils down to forming as fast as possible the required configuration of blocks on a given board.

Our goal is to place all empty moving squares in appropriate places marked with a red ball. Once there are more or less of them, but the scheme of action each time will turn out to be very similar. The key to success is the skillful and thoughtful control of the moving, illuminated corners of empty fields.

It is on the basis of their arrangement that we build our own strategy for reaching the final solution. Despite being easy and simple to learn the rules, our grey cells will sometimes be subjected to difficult tests. An additional difficulty in the game is the constantly elapsing time and a slightly dimmed game board, but this is a deliberate treatment, introduced to better maintain the specific atmosphere during the game.

SigNULL is an interesting proposition for people who can not only think fast, but also for those who can look for non-standard solutions, breaking out of the imposed rules and schemes. The peculiar atmosphere and diversity of the game are additional advantages of this noteworthy puzzle.