I just tried it out, and though I know it's still in alpha I have some thoughts.

It doesn't make sense that the metoers can fly through walls. It woulds seem naturally for me if they deflected instead. Perhaps made an explosion instead, which you don't wanna be near of.

It would be an idea, if you made sure that the game actually spawned the gems you needed. I waited 30 seconds to get 3 fuchsia gems. I died of time out :?

That's it for now.

Btw. Love your intro