@alex1st1 - Looks nice! With trailers, the first 5 seconds are the most important. You need to hook the viewer within 5 seconds to get them to watch the rest of the video. In your trailer, the first 5 seconds currently only shows the test “They came from bloody evening skies” – which at least is better than showing your game or company logo, which is a total waste of those critical 5 seconds. Can you get to the action faster?
Can you add more movement to the cutscenes? For example, when the stones land, what about a camera shake to imply that they have mass? Also, what about adding more exaggerated animations to the humans? At 0:28, it would increase the impact if the woman in the lower right reacted when the monster appears from the crystal. More camera shake and other effects during play would also make it feel more intense.
Can you show more gameplay in less time? Mobile players generally have short attention spans. If you can trim your trailer to 30-45 seconds, you’ll keep more viewers to the end.
It may help to add some indicators to the trailer that won’t be in the actual game, such as the outline of a finger clicking UI elements or dragging things, to let the player know how the game plays.
I understand that every game is a work in progress, and you might not have had time to polish the UI yet. But, as time allows, you could simplify the UI, especially in the upper left, and change to a fuller font that’s easier to read on mobile.
I think this game could do well globally, even without language localization. You can probably replace most of the text with symbols. For example, replace the [PAUSE] button in the upper right with a standard pause icon – the two vertical bars, like this: | |.
I have a story question: It seems that the players are Yeti. When I think of Yeti, I think of these mythical creatures:
But your Yeti appear to be human. What’s the story behind that?
Lastly, remember to include information at the end to tell the viewer how to get your game! If it’s free, also mention that it’s free to play. 
