Lets see if I can recall the steps.
I have two monitors, i opened it on my left one (monitor 1), with 1920x1080 and Fantastic graphics. Fullscreened.
I opened the game from the folder.
then I know I was confused because I didn't see my mouse. so I went up and down in the main menu with WASD
I visited settings, turned down both audios to zero except the first one (which I brought down to the first little "notch")
Then I started the game
Chose the top most saved file
Skipped the cutsceen either when the green thing hit the park or when the red truck was on the highway running over zombies.
Then when I spawned I know I walked over towards the gas station.
Then followed the guide to the camp.
That's all I can remember! Any other questions you have and I might be able to jar my memory into remembering more!
Keep up this game. I really enjoy (watching) it! :P