The download file is only an .exe file, so the project files are probably missing(?). I noticed the browser link from the game page.
Nice side scroller with really nice artwork and animations. Personally 'S' to interact didn't feel natural (so many games use 'E'), however your key pop-up was a nice reminder. It would feel better to play if the character movement were faster. Not sure how the multiplayer aspect will work...collaborative game? Fishing was the way to make some money as grinding out enemies took a lot more time.