OK, I've updated the demo and made a few tweaks. It's an EXE now, because it depends on some fixes in the next build of Construct:
This is the release candidate before it goes on the site, so any bugs, critique, feedback, anything not working etc. let me know!
Some new effects including water reflections so let me know how it runs (FPS in top-left), and your graphics hardware/shader version etc. Should run better at a lower resolution.