Spiral Galaxies is a puzzle where you have to fill an entire universe with galaxies. At the start of the game you only have the centers of the galaxies, it's up to you to expand these so that they take up all available space.
The tricky part is that all galaxies have to be "spirals" more or less; they have to have 2-fold rotational symmetry. In other words, if you rotate a galaxy 180 degrees it should look exactly the same as it did before the rotation. This means that if you expand or shrink one end of the galaxy its counterpart at the other side of the galaxy will also expand or shrink.
The "Spiral Galaxies" puzzle type was invented by the Japanese puzzle magazine Nikoli (the guys behind the famous Sudoku puzzle type). The Japanese name for "Spiral Galaxies" is "Tentai Show". The Japanese name is a play on words where "Ten" means dot, "tai-Show" stands for symmetry and "Tentai" is "astronomical things".
In the original game play you draw/erase the walls of the galaxies around their centers (represented by dots). In this Winterdust version of the puzzle the cells that touch a center (represented by a circle) is converted to a galaxy at the start of the game and you then expand/shrink the galaxies by dragging its edges.
+ 41250 predefined puzzles in total, counting all difficulties in all 5 predefined puzzle sizes!
+ All puzzles are sorted by their difficulty. Select Easy, Medium or Hard for the puzzle size you want and a fitting universe is picked at random from its 2750 available puzzles!
+ The game remembers which predefined puzzles you have already played to avoid making you play them again.
+ Random puzzle generation! Simply select desired width and height and a universe is generated for you. There is no size limit, if you think your device can handle a huge puzzle - go for it!
+ Quite fast generation/presentation of a universe. The engine is designed to build the puzzles over several frames so you'll see it grow while you wait for it to finish (unless it finishes in one frame of course).
+ Auto-solve option! Can't figure out a puzzle? At least you will know the correct solution when you give up, just let the game auto-solve the puzzle for you.
+ A experience/level-Up system has been implemented to give you some form of reward after solving a puzzle successfully.
+ Zooming/panning of the puzzle is possible.
+ You can lock (and unlock) a galaxy and in that way mark it. Useful if you are 100% certain of some galaxy shapes and want to highlight them.
+ Automatically saves your game! Stop playing whenever you want and pick up again from right where you left off.
Spiral Galaxies is the perfect puzzle for you if you want a logical puzzle. Use it to keep your logic in top shape! It's also perfect for children of all ages; an excellent tool for enhanced development of the brain!
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