Firstly, if you want to access all levels, type in OCABEBFA
Secondly, on the first level, if you knock over the statue, you can get a freeze power.
On level 16 (I think)- Efreet's palace, towards the beginning, as you're passing the towers, if you jump against the left towers' windows, you can enter it and collect lotsa of spinning coins. Though you will look as though you have shrunk. This is best done using the female.