We apologize for that, we left the mouse locked from the beginning, it was a small mistake, but as it says in the instructions, for the mouse to be seen again you just have to press the "Esc" key, and with that the cursor is enabled and you can press the UI buttons, if when you pass that screen you can't move try crouching, After uploading the game to the web we saw that it didn't start the same as from the engine and sometimes the camera is pointed elsewhere.
I hope you can see the full game, as I have seen that some people have lag and it can be difficult to get lost in the woods, however I saw in a comment that someone did pass it on and made a somewhat accurate map of the location of the escape car and the place where the car key is located, Which, by the way, is floating next to a tomb.
;)