Footsteps without regret, go forward step by step, not backward.
You can only walk one block at a time, starting at the starting point and thinking about how you should move to the next step until you complete the level.
There will be various difficulty obstacles in the level, such as the place where you need to pick up the key before unlocking the walk, or there are two footsteps moving on the floor at the same time, you need to complete both footsteps to reach the end point to pass the level, etc.
All kinds of challenges are in sight, let's try it out.