Here is the walk through for mission 7.
1. Talk to G. Go to the cabinet beside the gadget room door. Click the middle door and enter the code “key”. Take the magnet.
2. Go to the ice burg. Use your magnet to get the spring floating in the water.
3. Go to the beach. Talk to the yellow penguin there. Take the green pail sitting there.
4. Fill the pail with snow at the snow forts. (It has to be at the snow forts.)
5.Go to the pizza parlour. Take the sheet music sitting beside the piano.
6. Go to the town. Talk to the penguin there and tell him that you would like a poster. He will give you one.
7. Go to the stage. Click on the piano. Put your sheet music on the stand and play it. Once the puffle is your friend you must give him the poster and the pail of snow. Take the gear he makes.
8. Go to the gadget room. Put the spring on the gadget test chamber conveyor belt. Pull the lever and once the spring is in, press the flame button. Then pull the lever again. Do this with the gear, but press the snowflake one instead of the flame.
9. Go to the dock. Talk to the penguins there and tell them that you need the target they have. Play their game. Hold your mouse down to set the strength. The meter is on the right. Once you win they will give you the target.
10. Go to the gadget rooom and you will find a life preserver ring on a shelf. Take it. Give it to the penguins you played snowball with.
11. Go to the clock tower. Put in the gear, the spring, and the target you found. The penguin will cheer, you will get a call on your phone, and then you will talk to G.
Congratulations on beating that mission!