I've made some games with Unity myself (although never for android). I can't figure out how you imported objects such as book cases and chairs. You can see my games I've made by subscribing to my youtube channel... it's called U2bingdummy. Love your work!

This game is amazing! To learn where to download other free fps games, subscribe to U2bingdummy on YouTube!

This has to be my new favorite game for android! Love the concept