Magnet Balls comes from Gennadii Umanets.  The object is to drag the blue and green magnetic balls onto the red spots below.

There balls definitely have a quasi magnetic feel.  Try grabbing one of the blue balls in the middle and watch them bunch up.

I don't know how many levels there are, but I've done about 20.
This reminds me: there were 2 mechanical puzzles that had many magnets. Both were designed by Chris Morgan, a prominent member of the International Puzzle Party.
https://itunes.apple.com/us/app/magnet-balls/id1459738954"mt=8

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