Thanks for taking time and writing the feedback. We really appreciate this.
Regarding the "Plan your moves to create chain reactions and collect multiple runes in one go", please see this tutorial image 
You need to tap on this bonuses when you see them on the screen ;)
We indentifies the leaderboard bug and we are working on a fix now.
Thank you :)
Ok these resources are the chain reactions you speak of? I think I did misinterpret the instruction "Plan your moves to create chain reactions and collect multiple runes in one go."
The way I read this instruction it made me think that perhaps if I have 2 or 3 green runes all in a row I could collect all 3 of them in one move and I would recieve a multiplier bonus for each extra rune. For example
