i just figured out the tiles game, but i am wondering how i'm supposed to put my tiles into collection?

The tiles you collect while you play the regular game go into your Tile Case. Once you have at least 1 of each different tile in your Tile Case, you can go to the Mysterious Stone Tile Tray and play the special game to earn the Wooden tiles that go into your actual collection. The tile at the very bottom of the page glows gold when you are eligible to play the bonus game. Once you win a wooden tile it will show up in your inventory, you click it and there should be an option to add it to your collection.

If your Tile Case is close to having 1 of each tile, but not quite there, you can go to Tile Trading to exchange tiles you have for tiles you need. It costs any 4 tiles to trade for 1 missing tile.

Thanks!!

You're welcome :)