Hi Shane,
Glad you got it working. I have the Canvas as well, and it will work with both types of lights.
Now to your questions.
Some of the features in the implementation are considered custom commands and thus will not work in the standard scenes, routines and automations in either Smartthings App. So to use them you will need to write your own smartapp or use Webcore.
First, the previous and next arrows work on all the scenes stored on your Nanoleaf, not just the 3 you preset. Also, that code was written by the original author, and since I don’t make use of it, I’ve never even tested it. Will try to take a look at it sometime this week.
I’m not familiar with how the Ikea remote works, so can’t speak to how to program it. It will definitely be something other that this, but will refer back to the commands set up here.
The custom commands you might be interested in are
previousScene()
nextScene()
setScene1()
setScene2()
setScene3()
changeScene(“scene name”)
There are no arrows in the new app, not supported yet.
As to dimming, standard light dimming settings should work for this however your remote does it.
Let me know if I can be of more help.