You have the fundamentals of the game down pat and I can tell you get what you're doing, you're just a bit new at this. I noticed you have a couple weird banking wobbles, so I opened the track up in the editor, unfroze it, and tinkered around. The exit of your immelman wobbles a fair bit, and that was easily solved by removing every other rotation point and then rebanking it. What I suspect happened it is that it looked great until you made the loop afterwards, and then the loop existing messed it up. I find it's easy to do that with corkscrews, especially the exit. The vertical loop was really round for a B&M loop, and that's probably from the game's depumping tool, which tends to force everything into a more circular shape. I suck at loops too, I understand, but next time try and make it more teardrop like. The roll after the loop I feel was taken a bit fast, but it wasn't too bad relative to some other things I've seen. The way you combined the air hill with the roll was neat. Next time maybe you could make the spine thicker and imitate the arch shape the B&M gigas use and attach the two tracks that way. The S hill over the station was neat as well, however it doesn't turn as much on one side as the other, so it kind of levels out and then begins turning again instead of smoothly rotating through the whole thing. In the overhead view I moved the section between the S turn and the air hill before it a couple meters south (down 20-25 arrow key hits), ran the depumper, rebanked it, and managed to get it to flow a little better. It moved it out of whack from where you wanted it visually, but I'm confident with tinkering that could have been fixed by adjusting the station location by making the flat turn before the launch curve a bit more. The roll afterwards was well done and I honestly wasn't expecting that. my only advice would be to next time make the final turns a bit tighter so that they feel faster. You ride didn't end slow, but it felt a bit slow because the inal turn was so huge. In addition to the above, watch your support collisions. The top of the immelman had a pretty big one.
You set up a nice little area with the seating and the pond. I thought that was pretty neat. Maybe next time add a bit more to the park area so that it doesn't feel bare.