Hey, it's a cool idea! I think it just needs further development and polish. It took me a few minutes to figure out how to select the runes I need, because I thought it cycled through all of them at first. I didn't understand if there is any benefit to changing the runes in a certain order, or if holding certain combinations of the left and right rune give special powers, other than just targeting two enemy runes at the same time. I think it could be a cool mechanic to add, so that the combination of two runes makes an effect that is greater than the sum of its parts. I think there's potential for a fun game here, if you intend to keep working on it! :)