My first thought was to add them to the hud same as lives and cogs, but then I decided to do it differently. When you press R near the stone circle it will activate as many runes as you are carrying, lighting them up. That way you can see how many you still need.
As for talking to the frog and the sliding movement, I'll change that after rating is over. I'm just glad I got everything working as it is inside the timeframe of the jam. This was actually my first action type game, with movement, AI, and what not. Before this I only made a couple of simple games for young kids (counting, animal sounds, alphabet, memory).