Mouse controls the start menu (the opening screen).
Choose new game, choose Town 1, customize the character using the arrow keys, press enter/return, walk around in the really basic world, click the icon in the bottom right corner to toggle on/off the build mode, and while build mode is on, click the brown box thing that was meant to be a dirt patch thing.
You can also have build mode off and hold down the left mouse button and have the character point at it.The changelog (not a lot of reading) explains everything, I think.
Oh and I think I'll be focusing on Blender for a little while. Blender does a pretty good job from what I've seen done with it (Big Buck Bunny), and I can get the game to work in Windows, too, so there's some cross-platform goodness.
I think I found quite a lot of bugs in Construct trying to make the guard NPC have depth... or I just couldn't find the right way to code it. And the Flame effect didn't work for me. All it did was color over my objects with a single color, yellow, by default. I don't know if it's the fault of my ATI card or the program. Anyway, check back later, friends!