Entertaining game! My only critic is that I wish there were more levels. You could definitely expand on this, and maybe even turn it into an app.
Thank you for the feedback.
It's interesting you mention that. I've been working since the submission to turn it into an android app and have added 10 more levels. Will push out the update in the next day or two, but might take a bit longer before it's on the play store since I want to make sure it's working ok on mobiles.
Originally I was thinking of using tilt, but settled on arrow buttons on the screen.
Since then been thinking that maybe a joystick would work better instead of the button, since from a few people I saw play it on the phone, they seem to think that you need to tap the arrows to move rather than holding the button down.
If it sort of helps, the left and right buttons are on the left of the screen while the up and down are on the right. This way when the game is in landscape mode on mobile, the buttons are not getting in the way of the maze.
Different UIs for landscape vs portrait modes are definitely nice.
Personally, I'd prefer joystick, because I often play on the road so tilting can be bothersome and I feel that joystick is more intuitive. Though I can see how arrows could suit your game since they give more precision when you move the ball(s) around. This might just be my opinion.
Good luck for your game! Can't wait for that mobile version!