
(Clicky)
This is a little bitty game about lasers and mirrors (actually pointers) and prisms. I don't really plan on doing any more with this, but I guess if something totally broken is discovered (I mean makes game unplayable, not a cool trick), I'll fix it.
You have a source:

It can build Mirrors:

and Prisms:

Mirrors redirect anything they are hit with to their current heading. Prisms split white beams into 6 colors, or redirect colored beams along a fixed path. The goal of the game is to redirect your laser into the enemy source long enough to kill it.
Every time a prism or mirror is hit by a laser, it gets a bit hotter (takes damage). They auto-cool well enough to deal with a single white beam, but any more and they start to overheat. Use other mirrors to repair and help "cool" hot mirrors.
Mirrors can "cool" things near them at a very high rate, and you can not build near the enemy commander.
Colored beams do 100 damage, white beams do 200. So 'focusing' 2 or more colored beams into a single mirror can allow for large damage potential. Also, if you aim carefully, beams can be 'doubled', allowing you to multiply your firepower.
Screens:

Focusing prism into UBERBEAM:

A loop!

Link again: http://spring.jobjol.nl/show_file.php?id=1091
PS: for more advanced tips, talk to Lurker. He's tricky.