Algodoo

Sometimes I need to execute script not only on key press (once) but on key release too. That phunlet should do the trick.

Look at box's onCollide event. It's not for collision handling, it called by lasers with "e=true" on key press and "e=false" on key release. So you can replace code (it only print info in console atm), reassign key (current is enter) for red laser and use it as you want.