Getting quite frustrated, being so close to finishing the game and getting stopped by pixel hunting of all things!

This is what I found so far:

The two entrances to floor 2, and both princesses.

If anyone can please point me in the direction of Floor 3, I would be really grateful.

Also, I have no clue how to open that door on the bottom left in floor 1, any help on that would be appreciated.



EDIT: It seems right after posting this thread, I managed to find what I was looking for, and quickly finished the game after that. Seems I was a bit hasty. Willing to help others with the Royal Tomb, if they need it.