Yeah, thinking about it, it feels a bit too "one-sided", always just the same. So more mechanics would indeed be nice. I thought about her calling you from a distance at first, but it felt too easy (therefore she'll "pong" you, if you "ping" her). And as a fun fact, I originally wanted to do just a blocky maze (think typical GameBoy RPG), then experimented with polygons and finally thought "Why not use a bitmap, it's way more easy and flexible?".