To get some technical insights, watch the video of the talk about JSSMS I gave at Reject.js 2013.
There are also the slides in HTML.


Button Player 1 Player 2
Left Left Num-4
Right Right Num-6
Up Up Num-8
Down Down Num-2
Fire 1 X Num-7
Fire 2 Z Num-9
Start Enter Num-1
Fork jsSMS on GitHub