Lovely characters, lovely story, and nice gameplay :) Finally a non-pixel art submission ^^
You made the animations yourself as well? Wow, I really loved the smoothness and artstyle of the characters, especially the dad! I bet you used Flash for the animations, or? Would love to know your secrets behind it because I've been sort of struggling with animations in HaxeFlixel -- it just feel a bit more tedious than in Flash.
Anyhow, I must confess that the controls felt a bit awkward. Having to move with WASD and use SPACE as jump key just didn't feel comfortable. You should made W the jump as an option as well :) Other than that, I felt the game was a bit too simplistic, like there was no real challenge to it or the enemies, so I'd love to see an update or a sequel of some sort that carries over the sweet artstyle and animations and incorporates a bit more to the game :)