So, uh, my first impression of the game was... awkward. I reached the battle with the brother, didn't know which input would let me attack, I pressed Enter out of curiosity and then respawned at what I believe is the area you go to after your brother beats you up. Oops?
It's a pretty nice game from what I've played. Definitely has an incomplete feel to it, but you've got swimming in it so y'know, it's neat'o.