When working on the TAS a few months ago we came up with a route
http://pastebin.com/U3Z3jfGA hopefully this will stop anyone trying to come up with silly routes that don't make much sense as seen earlier in the thread.
The icicle pyramid section would look like this
https://www.youtube.com/watch?v=Yrw8-1IPYCw if you've seen any 100% RTA runs, you'll notice they lose the minigame to get the trophy. This is roughly 30 seconds faster than winning the fastest race in Snowflake Mountain (snowball valley)
Also after looking into tapping the A button specifically in car, we found its faster to hold A until a certain velocity, then tap every other frame until a certain velocity, etc. Until you are tapping A every 4th frame.
So using that we created this slightly unoptimized TAS
Dino 1 TAS
https://www.youtube.com/watch?v=W8KhZdVfcJE