On a different website, my brother beat the last evil wizard guy and now is trying to find all the hidden levels. For each hidden level, you can only use one gem type, like only green gems. So for each gem type there is, which is 8 or 9, there is a sercret level for it.
I really have to say that this particular SCGMD game was pretty crappy when you compare it to number 2. I think it is fun but when you can play the second one I wouldn't play this one.