After clicking on the Start button, you will be prompted to select a level. At first, all but the first are closed, and in order to open it is necessary to try. Solve puzzles and collect a certain amount of coins. There are quite a few levels in Red and Blue Stickman 2. Enough space for everyone, especially given the duet in this story.
Once you have chosen a level, you have the option to choose the difficulty, which will be your first decisive step. There are hundreds of ways to solve problems here. The application is particularly original: each task will be more interesting and trickier than the previous one.