The ball's not too fast, just tap the key, don't hold it.
It's a bit short, and there's not much to the game, but it's a nicely done game design exercise that was fun to play.
Artwork is excellent, gameplay doesn't entice - quite the reverse, usually games of this genre have crappy art, though some are really fun to play. Maybe a cooperation is in order?
The control is very finicky, I think the physics need some tweaking. I feel I am fighting the physics half the time instead of solving the puzzles (?), and that just aggravates. No fun.
I like teh game mechanics and concept, but the interface feels very unresponsive, I should be able to just drag supply lines, and cut them more easily.
I'd rather have control keys: shift to delete (I am often still in delete mode and think about moving - not good - letting go of shift is simpler), and maybe Ctrl to "lock" the orientation of the piece that I am moving; also, shift-click on a joint should, if possible, just separate it (and maybe push the pieces apart a little).
 "Secret of Life Flower: Part I"){kind=icon}
 "Fugi Ball"){kind=icon}
 "Sky Machine"){kind=icon}
 "Orange Christmas Boxes"){kind=icon}
 "Glow Cut"){kind=icon}
 "The Forest Temple"){kind=icon}
 "Color Splash"){kind=icon}
 "Competitive Line Waiting"){kind=icon}
 "Caatastrophic Construction 2"){kind=icon}
 "Super Energy Apocalypse : RECYCLED!"){kind=icon}
 "Squanda Grey"){kind=icon}
 "Siege Master"){kind=icon}
 "Are You Good At Flirting"){kind=icon}
 "Evidence of Everything Exploding: version 2"){kind=icon}
 "So Close Escape"){kind=icon}
 "Balancing Gold"){kind=icon}
 "Find the Numbers Challenge 40"){kind=icon}
 "Hexx"){kind=icon}
 "The Magic Pipes!"){kind=icon}
 "Bin Jumper"){kind=icon}