Very nice coaster ! The on-ride does feel a bit too fast, but it remains surprisingly smooth and intense.
Your architecture is stunning and never dull. Cornices, variations of shapes and textures, diagonals and straight pieces, columns... Lyndvior's buildings have it all, and aren't too tall for a theme park. I like in particular the spikes you've used on the top of some buildings.
The pathwork is very neat as well, with elegant curvy path borders, and a flawless use of L33's Alpha textures.
Your mountain terraforming is quite impressive. I think you've matched the right compromise between foolishly spiky peaks and overusing the flat terrain option. Considering RCT3's fairly awful terraforming tools, it is an achievement in itself ! You also patiently mix terrain textures for a smooth, natural feel - sand, rough grass, snow and rocks blend in a manner which is neither too random nor too simple. The only (major) trouble with the whole landscape is, in my opinion, that instead of building a terrain coaster, you've put steep hills around the otherwise flat coaster. As such, the train isn't hugging the ground to provide nice interactions. A relatively flat coaster isn't necessarily a problem (Katun, Pyrenees and Expedition Ge Force are good examples of excellent non-terrain rides), but since you display such amazing terraforming skills, I feel it is a bit of a waste not to use terrain to enhance your layout. Phantom's Revenge and Helix, for instance, would be great examples of clever blending between coaster and landscape.
Having said that, it is nonetheless a fantastic design and I wish you good luck for the DAI3 ! My entry should come soon as well
Cheers,
Portem!ne