To start this game is incredibly well made for a 2 week project. It's replay ability and overall just fun mechanics make it a very fun experience. Additionally, the fact that its not that easy makes it a very challenging experience for the user. One thing i'd like to compliment is the addition of a horizontal and vertical sensitivity option. I personally like to use EXTREMELY low sensitivity on FPS games and having this option available makes the experience even that much more enjoyable.
Some things that can use some more touch up are definitely the background and the graphics of the whole thing. Personally, the minimal aesthetic doesn't fit for a game like this. I feel a beautiful landscape which is visually stunning would take this game to new heights. Additionally, maybe some key mapping would be a cool addition as on a mac laptop it is very hard to rightclick to get that grapple out.