Woah you really went all out with the visuals amazing job. The paralax really helped with the immersion and the musi was very fitting for a bleakly colored world. I did have control annoyances but then I switched to the controller. Also, I read your comment how you had something originally as shift but you changed it back to space: keep in mind that because of most fps games where sprint is 'shift' and minecraft where shift is also commonly pressed, most of the videogame audience have that option your friend mentioned already off.
Amazing work though I hope you plan to make this into a full release because I feel like this has what it takes
Thanks again for playing and rating!