This is probably a really dorky idea, but I thought it would be fun if you could change the girl's outfits. Seeing her run across the balance beam in the pendant room, as well as the way she jumps, reminded me of a little ninja, so I thought it would be cute if she had a little ninja costume. Maybe the robot could have different armor styles too, and these would be like "Easter eggs" that you find throughout the game, not that I mean to make more work for you guys. You've done an incredible job already, and with a few more levels I'd probably buy up the game as it is in a heartbeat!
That reminds me, I also thought it would be cool if the robot could smash open barrels or crates with his sword. And on the topic of the girl jumping, it feels a little clunky how she runs, jumps, and stops when she lands, rather than hitting the ground running.
I don't mean to bug you with all these posts but this is my first time "alpha testing" anything, so I'm taking it pretty seriously; kind of like a dream come true. Keep up the good work! And by all means, have fun!