Intertwine-esque ball course. Also considered calling it "Predator and Prey" or something along the lines of that, but I feel like the ball is playing around with the laser more often than not.
Done in 7 hours. I was bored today. I'm on vacation, but have nothing to do and nowhere to go.
The ball frequently moves ahead of the laser XD the laser has to skip a lot of it in order to catch up.
The cool thing about this is because there's no glass, the laser is totally dependable and it's impossible for the course to fail. Unless, of course, the laser didn't hit the firework at the end. Which would be pretty sad...