Toss the Turtle, shoot turtles as far as possible to earn money and upgrade Cannons, Bombs, Guns and equipment. First you control the direction of flying from Cannon, then click and hold to gain power, try to gain maximum power and release to shoot. Use Sling Shot or gun when you have enough money to shoot the Turtle flying further. Try to collect money and there will be other support tools on the way that will help you fly farther if you are lucky enough.
Using WASD to control turtles when landing or flying will help fly further.