Doodle Verdediger is an interesting concept: draw the ship you're going to use to shoot the nasty V-things! You can use a pre-made ship or you can draw your own. You can use any shape you want and you can scale it to be as big or small as you want. Use the F or Spacebar to shoot. Every level you get to spend money on upgrades like a shield, a faster firing speed, a fire burst, or you can even add a cannon to your boat which you can draw yourself. Leveling is fairly easy at first so there are more challenges as you move on and more power-ups to purchase. Doodle Verdediger has a lot to explore so start now!