I just wrote a tutorial on how to use Construct 2 to make a ball bounce in Firefox OS. After all, Firefox OS is 100% HTML5 (with some phone stuff added like Device Orientation) and Construct 2 offers a really good working export that makes it easy to put your game in the Firefox OS Marketplace.
I did this as part of my blog on Firefox OS and you can see it at http://firefoxosgaming.blogspot.com/2014/04/bouncing-ball-in-construct-2-game.html. You can get the capx at http://thulfram.com/C2/Construct2.html.
Or you can read about the six ways to bounce the same ball in HTML5 code using CSS, Canvas (two ways), or SVG (three ways), if you like coding.
I'm going to do a series of tutorials and games using Construct as I see how well it fits. So far it fits just fine!
As some of you may know, Firefox OS is growing fast, but you may not hear much about it because, not wanting to compete with Apple and Google, the Firefox people are putting their focus on Europe, Asia, and South America. With cheaper phones, too, like my unlocked $79 ZTE Open which I use every day to play with the OS (and make phone calls and play music).
Construct 2 + Firefox OS is a great combination!