My project is in a presentable form (with improved animation sequences and a 'play music' option of an original composition) at this address:
http://www.singadream.com/constructexport2/index.html Seems to work with all browsers and even with my mobile phone. I'll leave the other prototypes up for a while in case anyone is interested in comparing.
Impressions of Construct 2, the program used to put the material together and export to html 5:
+ Great compatibility with Anime Studio, just export your animation in png format. I did that with half size and half as many frames. To save on kilobytes, I exported the background as a single frame, then the animation separately with no background. Using the batch cropping function (shift plus crop) there are no bloated animation files. The animation frames can be imported by drag and drop or through the sprite editor.
+ It's not too difficult to program different animations in the same area of the layout - you can have several actions at the click of one button: one each to stop the other animations and another one to start the one you intended (all on the same click and the same event).
+ Export to HTML 5 fulfills the dream of near universal compatibility with different devices and browsers.
+ There's an active forum and lots of tutorials.
- Some quirky functions poorly explained in the manual, stringing together events is not much easier than learning code.
- Layout is tedious, either you follow a super-complicated method of formatting css functions (more than 15 steps!) or you format each text item separately. No way to change the format for your entire text in the project.
Please note: I can't say much about actual game-making because my project is closer to a power point presentation with some extras. The full version (allowing more than 100 events) costs 99 Euros here, but it's a lifetime license, by which you're sort of betting that the developers will continue to improve the software for years to come. If you earn zillions with it, you have to get a more expensive license (still under 500). I haven't tried exporting to Facebook or to a commercial game site, all of which is supposed to be possible (as well as desktop versions of the game and special mobile phone editions). If the Adventure Game Studio had these export options, I would definitely have tried my luck with it.