Neat little game!
Though, I sometimes had the feeling that the gems skipped over me? I was sure I would collect them, but then didn't. That was a bit frustrating.
And shouldn't the game end, when I've collected all 15 gems? Or do they respawn?
Thanks for the feedback!
I just published an update to hopefully help both of those issues :3
Neat, works for me, now! 18 gems in 1:21 :)