The objective of the game is to bring both of the blobs together, while collecting as many stars as possible.
Using a hint will show you where one of the items in the level needs to go.
Be very sparing when using hints as you only get three to start off with.
Each time you use a hint, a piece of the solution will be put into place for you on the level.
To unlock the extra-tough puzzles, you're going to need to collect the pets that are spread around each collection of levels. Or buy them via in-app purchase.
The longer you skid in the game, the higher you'll fly.
The nearer the vent is to the traveling blob, the faster and further it will be pushed.