Looks great, although it may be a bit busy. The funnest MX tracks are the ones that flow well. If your planning on holding races, make sure there the track is wide enough for multiple lines in the corners, not much worse than being on a one lined track behind a slower rider. A slow steep "crowd pleaser" in front of the stands is always fun.
Water runoff is a big concern too, low spots are bad when it rains, perfectly watered tracks with big mud puddles before the jumps suck. Good luck, hope it works out.