Dear innocentking,
I'm honored to receive your first comment! Feedback is definitely not reserved for game developers, and I appreciate that you've decided to describe both your enjoyment and the things that you perceive as shortcomings.
And I think that you're right - the dolmen requires more effort on my side and more visual clues. It's one of the oldest parts I've added to the game, and after reading your comment I think it needs to be updated to better reflect the quality I'm aiming for.
Thank you once again!