In Aeropack, you should have to run, climb and fly higher on your way all the through 30 most unique platforms by collecting all of the provided green gems all before you make your way towards the given door. The game is not as easy as it seems to be, because it provides extreme interest & difficult steps in every corner for having steam-powered pixel bots, bouncing gears and dangerous cannons that are launching in purple bullets. But be sure and pick up all of the fuel tanks when you find them in your way to stay in air for a long period of time.