What is the route to clear stage 1?

The way to clear stage 1 is very easy, you are asking about the one with the boxes right?
First when she is lying down make yourself familiar with the controls, then after the red gauge is filled up(faster due to pressing the command buttons) and she can move, walk forward (towards your right) when you keep moving use the up button and move forward(right) button together when you are right in front of the box, after you climb up move forward(right side) slowly and then when you jump of the box automatically, STOP, then turn back(left side) by using the left key and start pushing the box, it will stop being presented at a time then remove your finger from the left button and press again, do these actions repeatedly until the box is a little distance away from the wall, climb up the box, the turn back towards your right side with the right button and again climb up by using the up and left arrow key combination push the box (upper one ) repeatedly until it falls down, move forward(right key) and you will make on the box, turn around again, Crouch using the lower button and move backward at the same time (towards left) slowly, after you get down, turn back to the front and push the box repeatedly by pressing the right key until it is near the right wall, don't push it completely or it might fall down[maybe? I'm guessing because once I went there (without the box) and feel to my death] climb up to the box, move forward, and when you are standing right in front of the wall, climb up again using the same combination, move forward, and enter the doorway, and
woosh you have cleared and can start from there again!