Awesome game. I love it, BUT......
Please, please, PLEASE add an option for a floor, walls, and a ceiling in the next version. That would make this a really fun game. The reason I request this is because I just had two red nodes connected by a spring in a zero-gravity field and I was spinning them around and when I let go, it slingshotted off the screen. Bounce physics would add a whole lot to this game, but PLEASE add a frame around the field to stop things going off-screen. Thanks, and keep up the amazing work.
Ratings:
Graphics: 10, everything was smooth, the color/thickness customization really adds to the game, and the balls look cool.
Style: 10, Although I've seen this type of game before, you did it with such style.
Sound: 6, Either add more music and an option to turn it off, or just take it out completely. Sound effects would make this game better, but repetitive after a while.
Violence: 2, No blood (not needed here), throwing a person around was cool...
Interactivity: 10, Of course a game like this would get a perfect score for this category...
Humor: 9, Haha, throwing things around is always good for a laugh... I saw the slingshot effect and I was like Whoamg!
Overall: 10, Only minor problems, but they don't really affect the gameplay. Just add the floor, walls, and ceiling and you'll definitely be on my favorites list.