Be mindful of Adventuron's limitations please if prototyping on Inform 6 :-)
That's what I did for 'Seeker of Magic'. I prototyped the full game in 1 day, then ported it to Adventuron in about a week. I had to do a lot of messy workarounds, of course, but the process worked well for me. I added the graphics in the second week and did some enhancements and fine tuning in the third week.
The syntax in Inform 6 is a lot simpler than Adventuron, but the workflow is more complicated. I've got it automated to a certain extent. I can double-click on an inf file to open it in TextPad for editing, along with auto-indenting and syntax colouring. I've got custom, single-key commands to compile the game, run it and open the doco in a chm file all from within TextPad.
AND I GET VERTICAL SCROLL BARS! Hooray!