Tried a few times, with a similar error. I've never worked with Unity, so I don't know how to debug a problem inside Unity native code. I can't post all of the logcat data here, but this seems to be the most relevant:
01-20 10:20:49.570: I/WindowState(411): WIN DEATH: Window{1f4c259b u0 com.pipsqueake.cupi2015/com.unity3d.player.UnityPlayerProxyActivity} 01-20 10:20:49.582: I/WindowState(411): WIN DEATH: Window{2d726002 u0 com.pipsqueake.cupi2015/com.unity3d.player.UnityPlayerNativeActivity} 01-20 10:20:49.583: W/WindowManager(411): Force-removing child win Window{2eedb347 u0 SurfaceView} from container Window{2d726002 u0 com.pipsqueake.cupi2015/com.unity3d.player.UnityPlayerNativeActivity} 01-20 10:20:49.603: W/WindowManager(411): Failed looking up window 01-20 10:20:49.603: W/WindowManager(411): java.lang.IllegalArgumentException: Requested window android.os.BinderProxy@367fad13 does not exist 01-20 10:20:49.603: W/WindowManager(411): at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:8412) 01-20 10:20:49.603: W/WindowManager(411): at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:8403) 01-20 10:20:49.603: W/WindowManager(411): at com.android.server.wm.WindowState$DeathRecipient.binderDied(WindowState.java:1113) 01-20 10:20:49.603: W/WindowManager(411): at android.os.BinderProxy.sendDeathNotice(Binder.java:551) 01-20 10:20:49.603: I/WindowState(411): WIN DEATH: null 01-20 10:20:49.752: I/Zygote(131): Process 3008 exited due to signal (11) 01-20 10:20:49.802: I/ActivityManager(411): Process com.pipsqueake.cupi2015 (pid 3008) has died