Short, but clever. It feels like some kind of massive ancient structure built by aliens. The only places that tripped me up were early on (hint: look up).
The artistic style put me off at first, but it grew on me. While there are a few things that you have to just randomly click to find, most of it is very intuitive. I wish more point and click games were like this.
Nice idea for a puzzle game. If you ever make more levels, consider having multiple stones in line with the goal, so it isn't obvious which one to use last.
Also, it would be nice to have a grid visible and an undo button
Yay! Glad you like it. :D [-fex]