Very well done! I liked it a lot. It was a very interesting idea. And a nice story, too.
The collisions were a bit unforgiving. The puzzles were good, I loved them all. I found it weird that you would go back to puzzles with the mummy chasing you and you having to bring their bones to the past after introducing all the other mechanics. That puzzle came a bit out of nowhere. However, still a great game.
I loved the puzzle with the 3 items that you had to be careful not to leave together in certain combinations... but it had too much text! The two signs were basically equivalent. You could easily just keep the left one and the puzzle would be basically the same.
Overall it's a good game. Nice job!
And congratulations on your 20th rating!