Performance issues

So, I've been playing Dark Sword and enjoying it but I've come to an issue. If I play if for more than a few minutes, my device starts to drop frames, causing the game to lag, making it difficult to play. What I'm wondering is, would it be possible for the developers to add in a "simple mode" or something or that ilk? Something that disables the background, replacing it with a flat colour, turning off the more flashy bits, or lowering the resolution for it would run at a more consistent frame rate? A toggle just for those that may have an issue with the game.