Slingo Deluxe

Free spins:
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Submitted by: RM

You first must get at least one free spin. On your seventeenth spin, you will
be asked if you want to use a free spin. When this happens click "Yes" with 
the Left Mouse Button. Repeatedly click on "Yes" as fast as possible until it
disappears. Notice that your free spins will be a negative number. All four of
your spins will now be free, even if you only had one free spin.