OK I had another game or 2 of this. I scored 23000 in my last game which appears to be high enough for the leaderboard but my name is not on there.
Also you have mentioned in the gameplay tips: "Plan your moves to create chain reactions and collect multiple runes in one go." Maybe I am misinterpreting this but I could not figure out how to collect multiple runes in one move.
And an observation: It almost feels like this game should be played using the keyboard... eg, w = move up, a = move left, etc. However I see that this would no work as a player does not always wish to move in a direction as far as possible.
Overall - still a very nice game, plays well and it leaves you wanting to play "just 1 more game".
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
