I have been experimenting for several days now with kik bots using NodeJS. However I have not, despite my research, been able to find any examples of the implementation of buttons using NodeJS. I am referring to the keyboard options the bot presents you with to choose from, so you don't have to type your response in.
other info: I am using ngrok, I am testing this under the android kik app, I am running the kik server on Linux mint, I have tried using on line web services, but find they overcomplicated things or are often broken.
The feature you're referring to is called a "Suggested Response" - it's documented here:
https://dev.kik.com/#/docs/messaging#keyboards
If you're using our node lib: https://www.npmjs.com/package/@kikinteractive/kik#Message+addResponseKeyboard
Hope this helps.
David @ Kik