Works well on a technical level, a 3D fps running in the browser on my PC without a hitch is impressive ( mine is kinda low end ). I think some background music would be a quick and easy way to increase the immersion a bit, maybe even switch between action theme and phone theme when using the phone. It was pretty harsh swapping between activities though, I can see that being the point but I think in practice it just comes off sort of tedious , kind of like phones IRL so points for accuracy at least :D
A nice entry for the jam good job getting it together so quick!