The game features very simple controls, with badges scattered throughout the level. When near a badge, hold down the tap or mouse button to grab onto it, then release at the right time to continue your flight.
There is also a hidden icon on each level, see if you can find it.
Each badge collected earns points, try to collect as many as possible on each level.
Use your points and badges to purchase new costumes for Nubika, try to collect them all.