Yikes! What you have done is indeed extend the drain line, but I'm fairly certain that this will overload your washer's discharge pump, and at minimum will definitely void the washer's warranty. If you don't mind replacing the washer pump from time to time, it will probably work. It won't burst the line, its not under any significant pressure.
Just for the look of it, if nothing else, you should figure something else out. Front load washer doors are usually not reversible, unfortunately, so you probably don't have an easy option of switching the washer and dryer to at least get the drain closer to the standpipe. Then again, I have the same problem, and the door is just a little bit in the way when switching clothes over. Its a little annoying, but I barely notice anymore, you get used to it pretty quick.
I'd have the plumbing moved... if nothing else, put in a new standpipe outside the wall behind the washer and run a 2" drain over to the existing drain line outside the wall. At least it will be below the machines there and look better. If you're building stands for the machines, you can run the pipe through the stands and keep the machines close to the wall.
Based on what you've done here, I'm going to go ahead and suggest that you not try this plumbing yourself. Hire a plumber. Its a small job, you should be able to have it done relatively inexpensively, at least compared to the problems you're going to have from your DIY install.