Thanks for playing! The gems actually have point lights attached to them to make them easier to see and I thought about glow, but in all honesty I think an outline shader plus a glow effect on the gems
would be the best approach,
but it's too late for that now. I thought the point lights would make them easier to see, but once I realized that it didn't, there weren't much time left that I could spend on it. But I hope it still worked out fine regardless :)