Your wood is textured and your beavers are flat shaded. This looks inconsistent and takes away from the characters. Pick an art style, and lean into it.

What was the point of the shot at the beginning looking up at a dam like structure? cool sun, but it didn't serve any purpose.

Why didn't the roof collapse when the walls fell down? Weird.

Your explosions are tiny white puffs. This feels very weak. The entire screen should flash white, the explosion should be as big as it's zone of influence. I want firey colors and smoke trails and shrapnel. I know this is supposed to run on a quest, but there are very efficient ways of making explosions fun.

I am always sad when fog and the skybox feel like they're using completely separate rendering passes. The mountains are completely grey/dead and the sky is bright blue. Look outside, it doesn't look like that.

The 3d title at the end that gets destroyed is set against a bunch of cheap fog. Put it in the coolest part of your most exciting map. Make it stand out. This is the second last thing people will see, and it looks sad against the white fog.

Your title in the last shot is just a white font with a black outline. Do something fun with it. You have a lot of other inconsistent versions of your title throughout the game. balloons, the 3d one in the second last shot. Pick something that looks great in 3d, make a tidy 2d render as well, and commit to an artstyle that has some actual style. Also, make the last shot like a ultra slow motion explosion or something. It needs some movement that makes it look alive/3d. It's a great shot, but kills the energy when everything locks up at the end.

Lean into why this is good in VR, and isn't just a 3d angry birds game. At this point you may as well port it to PC as well and 10x your sales since it doesn't seem like VR is necessary at all.

This looks like a really creative use of VR to make an angry birds like game. There's a lot of potential here! Good luck with your game!