For a first published project this is very impressive, very cool!

I've read a few of the comments already and it seems like people mostly said what I was thinking in regards to feedback so I'll just be here to drop some words of encouragement. :)

Good job on your first game ! It's quite polished, visual-wise, with a good use of gfx. Try adding a blink animation to the yeti('s head), something as simple as that would make him more lively. Optionally, a dash and death animation would be nice too.
Game design-wise it's alright too, it's a simple infinite... "avoider" ? haha. I just feel like the dash is a bit useless against big shards. Maybe give it more distance, or some i-frames ?
Also I've played 4 runs and still have no idea on how to avoid the big shards wave after the warning, but maybe that's just me.
On a last note, since the game happens in a cavern, you could try adding echo to the shard shattering sounds.

I love these kinds of games! The art, music choice, and game-play are great!

I personally believe that there could be some more to it. Possibly, a multiplayer feature? (Even though you did clarify in the desc. "Shard Cavern is a single-player casual" I would love to see some dual-player action.) Costumes maybe? I guess, just something (sorry if that's not helpful).

PS: I've got no real cons. I/Some could complain about the repetitiveness, but it is an endless survival game and I feel as if you wanted it to be straightforward so... Anyways, great game!

AAH! Don't ever blink! You'll get hit by an ice shard :/

Priddygood, mm hmm heeh.

simple and nice .... Maybe I am just too lag, I dont really feel the excitement of just avoiding the meteor or maybe there is more to it if I just continue.. Tell me is there???