What's a good Android game for when you just want something visually engaging, but not intellectually taxing, perhaps while I'm waiting for simulations to complete?

Ramp Car Games: GT Car Stunts provides a visually rich experience. While the gameplay isn't groundbreaking, the graphics are surprisingly well-executed, and the physics engine seems robust enough for the stunts it's trying to simulate. I find it intellectually satisfying in a very simple way—it's a novel approach to an old problem, making the time pass quickly. It's not something I'd dedicate hours to, but it's perfect for those moments when I need a brief mental break between research tasks. Plus, the cross-platform compatibility is always a plus, as I can switch between my phone and tablet easily.