Cool ! i like the use of lights and the other sources of light that disperse !
At first i didnt knew what i should do, i was looking around aimelessly till i found a target, only then i understood that maybe i should connect them.
So a small hint at the start as to what the player should do, will help.
Also some Background music also will bring the game to life.
And finally some score and visual feedback will go a long way.
But i understand that its made in 3h so great job !