I took that idea to its extreme and released "Geodesic Asteroids" on iOS (free) a couple of years ago. You can play on the 2D map or an embedded torus. There is also an old blog post I wrote at the time: http://nbodyphysics.com/blog/2015/03/06/asteroids-on-a-torus...
Maybe it would be interesting to have somewhat of a switch between the 2D map or the torus map, in that while playing 2D you can enter a challenge state where the map switches.