Building your own linear accelerators! Atom Smasher!!!

Now you can live the childhood dream, the universal desire everyone had as a kid: building your own linear accelerators!

If you enjoy geeky construction/puzzle games, I think you'll like it.

It's an engineering game, although the physics involved are not the sort you find in a bridge-building simulation. It's got some odd concepts in it, but I think you can figure it out if you start from the top.