Hi, td6542ad, thank for so much for your feedback. :)
About the camera. I released an update 1.1 this morning that added a second camera to better localization on the scenery.
I dont know at the moment how to make objects invisible when in from of the camera.. But I will maybe add it in a later update in case the second camera is not enough.
About the menu that show/hides all keys.. In 1.2 I will make it hides all keys except for the Z key (Key that show/hides all keys)
About the movement. Several people said the same thing. I will make the turn a little smother, and maybe add a slider ingame to change the sensibility manually for each player.