I can't get over the first jump either, been trying for 10 minutes. Sorry guys. I know it's made in a week but not having some direction for this impossible jump is cutting the corners a bit too much. I've tried every combination of double jump and dash that I can see - the best I can get is she's blue and she's above the ledge but heading away from it so she can't land on it.
I even glitched through the wall to my death in my attempts.
According to the other reply, if 2nd thumbstick is required to move the camera 90 degrees to perform the jump, why doesn't the camera start out that way? Not that it helped, so not sure if that's the answer either.