I will be realy happy to help you to improve the guide!
I think tips in http://spiralcodestudio.com/ are very usefull. There is things I have never heard about. Like have condition in equation. We learn lua with corona, I think there not many user who know lua before know corona. For example, I know C, C++, C#, Java, Python… but I discover Lua with corona, I realy enjoy this langage. And at the begining I look only in corona site how lua work.
In this https://docs.coronalabs.com/guide/basics/optimization/index.html it would be great if the user want to know more about the optimization (https://www.lua.org/gems/sample.pdf). And give some good practice (it’s don’t improve perf but it help to don’t have bug), like create destructor when we display things.
I use corona to make large game, it’s made a few year I work with it and I haven’t understand what is composer, scene or what I will win to use it.
About physics, do you have any stats of use? I realy don’t understand why there is people who use it. I find easier to rewrite my own physics engine and have very higher perf.
It could be great to receive notification by email when there things update in guide (for user who are active in forum (other are not interest in it).
My suggestion are perhaps actualy useless because you update it. Corona change fast.
It can be great to have the same design for all page of the site of corona and when we do research in forum it can sugest page of guide or api…
Best regards
Rémi du chalard