My game was lagging extremely because I draw Scores etc with the "draw" thing (I never know how to call those things).
Anyway... with a little poke into the right direction by this therad:
http://community.stencyl.com/index.php/topic,7370.msg46756.html by Tom - FireCroc Games I managed to show different things on my screen and don't lose FPS.
First you need to download the "Label for iOS" behavior by Jon from StencylForge.
Then add visible local attributes to it after your liking.
(I added "Score", "Lives", "Coins" and "Keys")
Set up the rules for the different things to show.
Add the behavior to an actor and place that actor on your scene as many times as many things you want to show.
Edit the actors IN THE SCENE by doubleclikck. Set separately, what they should show.
I attach the screenshots, how I have set it up and what is the result.
1. is for showing images, because I wanted to show a coin and a key image instead of writing them.
2. is to set up what it should do for different settings
3. is how the actor setup looks like
4. is the result. Look at the top bar (graphics are not yet final for the game)