Object: Capture all tokens. 
 
First click the board. Zillions will fill the 4x4 board randomly with the numbers 1 to 16.
Then click all 16 tokens. You have to alternate the size of the number you click (bigger, smaller, bigger,... or the other way round: smaller, bigger, smaller, bigger,...). Furthermore, the number chosen must be next (orthogonally or diagonally) to the previous number.
 
You win if you can capture all tokens.
 
Variant 2: 5x5 board
Variants 3, 4, 5: three fixed problems
 
Due to the randomness there might not be a solution in each case. I have not come across such a case, however.
 
 
'Alternate' is closely related to the 'A-Maze' puzzles. (The size of the area stepped on is simply represented by a number here).
 
More freeware as well as real puzzles and games at my homepage http://karl.kiwi.gen.nz.