There's a lot of good advice here so I don't think there's much that I can add. I really like that you wanted to get a jump start on game development - you can already do more in Unity than I can :)
I love the art of the exterior of the house (on the main menu and such).
One thing I noticed that no one else has pointed out is that the walk cycle animation doesn't work if you're going left or right, only if you're going up or down.
This is a good effort. I know it's not where you want it to be but you made a game in 48 hours and it has a complete gameplay cycle (although there's nothing to say that you've won/lost but I know you'll fix that). Yay!