Thank you for review. =) Yeap, we had time only to proove the concept. And the story.. Well, we never had a concept for the story, just imagined some things on-the-go. Next time we do story-rich game we should have a concept on our hands, agree. Sadly, suffered from that not-that obvious mouse drag and drop myself. Looks like system MonoBehaviour methods “OnDrag” do not work that well and raycasting should have been done manually. Moving the walls / obstacles to a different layer and ignore them while raycasting from the camera sounds like a nice idea to me, thanks.