I took some liberty and changed quite a bit of the upper level ovals. Most notably, I switched the O36 and O48 curves so the ovals are more concentric. I also changed the center-to-center spacing to be wider and added 2 crossovers so you can run trains around both ovals. I was going to take out the reversing loop because you really need 2 or you'll have to back out to reverse again, but I left it in and just made it smaller so you'l have more access to the main level.
(NOTE: I rotated the whole layout to better fit the screen, easy enough to rotate back.)
And here's another variation without the reversing loop where you'd run 1 train clockwise on the outer loop and 1 counter-clockwise on the inner loop.
