I've convicted a murderer based solely on the fact that he was the only left-handed suspect. I wonder how well it would hold up in court if that was your only argument?
It would be nice if you could choose when to repel particles and when not to. I find it pretty discouraging when I start a reaction with a ton of atoms going towards it, and then they all turn away because I had to put my mouse there to start it.
"Build a computer"
No, I don't think that will work.
"Pick up the parts"
You pick up all of the computer parts and put them in your inventory. You could probably BUILD the COMPUTER if you put them together.
It's kind of dumb to base part of your score on life when how much damage you take is almost completely based on where the computer shoots, which is random. Even if you do everything perfectly, the lowest difficulty dude still has a decent chance of nailing you in the face with his first shot.
Volcano level is ridiculously hard and there's no way to make it any easier. If you're going to have a random, really hard level, at least give us a way to upgrade the crane or something. What's the point of the coins, anyway?
It would be nice if you could set some kind of percentage of health left at which point units would retreat. That way you could keep only the high health units up front, and your heroes wouldn't die so much. And also, it would be nice to be able to see what buffs were applied to what units, and when they ended. Maybe floating icons or something?