Need help creating play, pause, reverse, forward button functionality

My knowledge of Adobe Animate CC and CreateJS is basic (no prior Flash experience) so I need help with this. I am essentially trying to create movie controls on this animation:

http://evolution-dev.berkeley.edu/flashconversion/treeRoom/fieldguide-tree-square-anim-controls.html

There's nothing fancy about the animation, just forward movement of the timeline.

The play button:

_this.btnSmPlay.on('click', function(){
_this.gotoAndPlay(1);
});

The pause button:

_this.btnPause.on('click', function(){
_this.stop();
});

I found the script for the forward and reverse buttons on this forum here: https://community.adobe.com/t5/animate/play-in-reverse-in-animate-htlm-canvas-for-a-360/m-p/10828021

Problems:

• How do I get the play button to continue playing from the frame number that it has stopped on and not to go to frame 1 which is what I have it currently doing? 
• Reverse and forward buttons also don't work once the animation is paused.

Thanks for any help!