Hi there!
Always cool to see actual games being made using the plugin. I'll be sure to check it out!
Number of lights that can be used with Babylon.js actually depends a bit on your hardware, but usually is realistically around 9-10 lights at the same time. You can check this forum post for more info on that: https://forum.babylonjs.com/t/light-material-limit/17391/7
Are you already using raypicking in your project? Cause that seems to me what you're asking for when referring to "laser". Let me know if I'm misunderstanding, but picking by ray is already very much available.