I love the level editor but the thing I don't get is how I set the exit of a room...

You have to add item #9, it's the exit.
By default it ends the level.
You can link it to any other room.
Door mode ON to make it invisible, OFF to make it visible.
Trigger on ONMON to make it appear when all monsters are gone, group it with a key and trigger on pickup to make it appear when the key is picked up.

Hope I helped. :)

You helped me. I've been playing with it for a while and couldn't get the key to activate it.
thank's!

I'm sorry if the question sounds silly, but I couldn't manage to get the help in the voxed console (I typed "help", but when I hit the "enter" key, nothing happens...).

So my question is: how you can link the door to another room?

Because I made a very simple room 0 with some monsters that make a key appear when they're dead, and when you get the key the exit door (object #9) appears and when you cross the door... nothing ! even though I made a room 1 with an entrance door (#8)...

I update my post now that I read the "read me" file ^^"

It says: "In either case, select a room in the "Go to Room:" box, which indicates the room number to go to when the player touches it."

Now my question is:
Where is this "Go to room:" box???

When I select the door, I don't see any "go to room:" box in the option window on the right of the screen...

Can someone help me?

Thanks for the quick answer it works now :D
Just one more question: How do I add a "You win" screen at the end of the game?

If the "Go to room" proprety of object 9 is set to current room number, you got the ending screen when player get the ending pickup.

Luitoine: the properties (such as the "Go to room:" box) are just over the item selection. Place the item (or select it if already placed, with shorcut S) and the properties panel for the selected item will appear.

Luitoine: I read your question again and I think you are mistaking the doors objects (#8 and #9), that are simple decoration for the door ITEM #9 in the item tab. :)