Nice layout, could do with some refining though:
Firstly, The lift hill needs straightening. To do this just split it into the parts by pressing the "Split" button. Do it so you have three sections; going up the incline, straight section going up, the the leveling off. Once this is done, right click on the part you want to make straight & click "make straight". This should do the jub nicely.
Secondly, I urge you to make some custom supports for the most complex & high areas to create realism, you should find some tutorials on how to do this on the internet.
Lastly, the last part of the coaster needs desperately sorting out. I suggest you delete from where the track re-enters the station back to where the banked turn after the last inversion is. Then add a full upwards left helix, up onto the brake run, then a slow, slightly inclined turn back into the station.
Again, try & use the make straight tool where needed. Also maybe add some trees from the scenery menu & some hills & lakes in the terrain editor.
Hope this helps, keep it up!