Loved the game, loved the cliffhanger in the end (i really wanna know what the brothers will end up doing to each other lol), the play style was nice, its something i usually love, i was especially surprised by the voice-acting since you said that this was an experimental game. I'd describe it as a "fledgling RPG with the possibility of greatness" :P.
The only thing i hated was that it wouldn't work properly on Mozilla Firefox, even with everything updated to the last versions. I had to play it on IE to make the screen show at all, on Mozilla it was just a white square with music. The only thing i could see was the little tutorial box that said to use the arrow keys.
But i got to play through anyway. That counts :)
Make it bigger! :)