Yes, it's a hard passage. You first have to use the first mine to project the spiky ball away (by activating the mine just before the ball falls), and then once the spiky ball isn't in the way, you have to use the mine explosion to project yourself on the air and be able to get on top of the wall. I just taped a little video if you want an example: passing the first screen. I consider simplifying this first panel, but I like it this way..
Oh ok, that's strange, you should not need administrator to modify a file. I'll investigate.