I don't think the game likes my monitor's aspect ratio (8:5) The left and right edges of the game were cut off, took me a while to notice there's a separate end for Joe in the very first level of the game.
After changing the pc resolution in the settings (to fit a more common aspect ratio of 16:9) I've been able to see the rest of the level. (tried this after completing the game demo)
That brought me to a question what would happen if I made my aspect ratio 9:16 and this happened (The screenshot is oriented in a way how I saw it on my screen, the right side of the image is the bottom side of how my computer saw it):
Sorry for making a giant comment with these screenshots, just wanted to show what bug I found (probably some unity thing I won't understand anytime soon).
Anyways, amazing game! Great name choices ;)