Sealed!
At first this game may seem a little frustrating (it is), but once you get
the hang of it you'll be earning a considerable amount of ZP. Remember not to
get frustrated as this will take a few goes to win each time.
Step One:
This is what your game should look like:

You have your colour choices at the bottom, current colour selected at the top
and 9 chances to guess the combination.
Step Two:

Try an all one colour combination of pink, purple, yellow then grey to see which
colours are in the combination. You won't need to try blue since it will be
obvious if only four gold stars appear after grey then there must be one blue,
right?
My combination didn't need to even get to grey. You can see I've discovered that
there are two pink, one purple and two yellow in this combination.
Step Three:

Start with the colour that has the most matches and try to figure out where
they go. I went with pink and luckily I found out where they're placed within
two goes. Remember to fill the other circles with colours you know aren't part
of the combination.
Step Four:

Continue down the line trying to figure out the combination with the most
frequent colours first until you break the code. This may take a while, but the
payout is worth it :)