Hi all, I'm in the process of budgeting production for a Kickstarter campaign and one of the elements will be a short gameplay video. The game code is not read to be shown yet, so I'm looking into ways to demo the UI and a couple of gameplay elements separately. I could build it in Flash and record a movie of the animations. I could build in CSS3 as a web app. Or maybe Lua and Carona or Marmalade. Would love to hear from any devs who have built a demo separate from their actual game code. Thanks very much.
For quick prototyping use Stencyl or even Gamesalad. If you only need a GUI demo, those are the tools you want. I like Stencyl better.