Updated the post so you will get an exact picture of what will be available and what will be new.
I will be adding small hints so that player could find secret stuffs on their own. For example, in level 5 you can see gust of wind coming out of a wall where you will find three spiders.
There will not be any special enemies in those levels just few buff like, in sweet world there will be sweets spawning everywhere that will refill HP.