I'm glad I did play it because:
1. When laser beams intersect, they form a single diagonal beam.
2. Tunnels allow a beam to go through it, but block a perpendicular beam
Raytrace Lite has 120 puzzles and I've solved about 40 levels. It's harder than I thought it would be.
Other Laser Puzzles (Not a complete list!)
Laser Maze 2015
Shoot & Reflect 3x3
RouteOut - not a laser game, but uses mirrors
Mirrors & Reflections
Guide the Light