Not a bad start, but there are a few things that hurts the experience.
For starters, the character themselves: the head slips into the camera as you walk around because of the animation, blocking the vision from time to time. Perhaps trying to remove the animation from the hips up could help?
Second, like some people mentioned: the buttons to rotate the pyramid stops working. Seeing as you're using UE, I can't tell what the blueprint looks like, so I don't really want to suggest anything.
Third, two words... Restart button. I've seen a few people suggest it and seeing as right now, the only way to restart is but closing the game, I can't recommend it enough.
Fourth, this is more of a concern than a problem: the tablet hidden on the pot resting atop of the wall is hard to reach with a piece or rubble, not only that, but I'm pretty sure the tablet almost got stuck up there when I tried it. Perhaps a check to make sure it's not stuck up there would be good. As for reaching it, I'm not sure. Perhaps a larger hit box would be enough?
As for a quick suggestion, perhaps making the body align with the player's hand or something would be nice. It's a shame you can't get a decent view from the side in the mirror.
I'm sure you can make a great game with this though. Just need a bit more polish.