Okay, so I noticed very poor performance (on the free version) even when running with the GLES2 renderer. I got suspicious since this is a rather simple project, and after some debugging it seems the scenes are all running at the same time, which is throttling the performance.
You should probably release the scenes while they're not in use. i.e. Restructure the project for instancing if you haven't done so already, as performance will suffer the more scenes get added.