So which one is preferable to play? I assume that the "old engine" versions are for mod support, and that I should play the 2.0.6B release, even though it's older than the "old engine" ones?

The full game is on steam

Demo's really cool!

Please let us know when there's a steam page

It's great! Any plans of making it a full game? I'd really love that

The demo is lovelyI had a few of those "Ohhhh!" moments you always love having in a puzzle game. Please keep on with your work, you're doing great!