heart shape

l lost the heart shape the glass key its not in my inventory please help

Do you mean the wooden heart to go in the door?

If you haven't already used it, check through all your inventory - you may have arrow keys that will allow you to go left and right through them.

If it's not there, go back to the grand room and see if it's still in the bookshelf. If you close your game by clicking the X or using Alt+F4, you may need to repeat some steps when you load it again. You will not need to do this is you exit the game via the menu.