Performance is a issue.
You need to make each "clickzone" larger. Mouse cursor sometimes don't change, so I have to click to update it. I played this with wine, so maybe it works fine on Windows.
Camera needs a lot of work. For example, you have to make the sun always on screen, e.g. set the origin of rotation of the sun different from everything else. Maybe you can lock the camera to only four angles and make each angle look good.
Dampen object movement.
Sometimes I get stuck. Putting the icons of each pillar on screen corner as UI would help as tips
The hat flew out of bounds. Please draw faint lines on the ground and use that as boundary. You can also theme that.