Color Cubes

Cubes, cubes and cubes. All kind of colours and sizes. It's your task to survive the 3 levels.
Some cubes you can destroy, but to shoot them you have to select the right cannon. You have 3 cannons (red, blue and green) and you can only shoot the cubes with the same color as you cannon fires.
You cannot destroy the multi colored blocks. The ice cubes are the easiest ones to destroy because you can shoot em with any cannon. But look out for the dark green/purple cubes (see picture below), if you shoot this one, you will lose a life.