Click a left or bottom border position to fire a laser, which will be reflected by the mirrors. A counter on the top right will show the number of shots you have used.
After each move, click the border again (anywhere) to switch the laser off.
Every mirror which has been hit by the laser beam will flip by 90 degrees.

Beginners: You win when the laser beam leaves the board at the top right corner, thereby hitting the red or yellow target.
Experts: Try to solve the task in as many moves as given at the top left corner.

Solutions are attached (menu option HELP/SHOW SOLUTION).
All solutions have been found by hand, so you might be able to improve on them.

Variants 1-12: fixed setups
Variants 13-14 : random setups using 49 and 25 mirrors; first click the board to drop mirrors randomly.
Variants 15-28 : as variants 1-14, but you only win when you manage to shoot a laser beam starting at the bottom left corner (laser guns at positions a2 or b1) and ending at the top right corner.

Please note that there are six alternative piece sets available.

 
The name 'Flim' is an abbreviation of 'flipping mirrors'.

More freeware and real puzzles and games at my homepage: karl.kiwi.gen.nz.