Yes, that's what I meant but you phrased it better than I did.

Thanks for the tip about the interrupt, it might prove useful. Using the volume buttons is nice, but it's not very comfortable for me (probably related to the way I hold the phone). And I'm a bit concerned about long-term wear of the buttons.
Anyway, don't consider this suggestion high-priority : the game is already great as it is. This would just be icing on the cake.