Grimrock

I got the two tomb keys,and used it in 3rd floor.
Then lots of mummy came,and suddenly i was teleported to a desert.
But i just found a teleport.and i was teleported to Sleet Island.
Then? Is it over?Or i need to back for killing all of the monsters.

There's no "boss" but an epic battle in the desert. The main point of the desert is collecting another gem.

Thanks,i understand.