I went for one of the three pretty obvious coaster types in my opinion (Dive Coaster, Launched Inverting Coaster and Flying Coaster) and probably the most obvious one of those - Raven Turns and half inversions in general are just such a blessing when you are working with very limited space, also the possibility of a vertical lift hill that inverts at the top saves a lot of space as well. The theming on the entry is kinda minimal, I didn't really know what to build with the extremely limited space left after building the coaster and paths.