I really would like to say thanks for the great tutorials on the wikipage! They helped a lot. Furthermore a lot of thanks to you Zukero and Ian, you to answered all my questions i had
Tiled is a very easy to learn program, the content editor is great too.
There were just a few things i stumpled above;
While creating the traps there was one time a strange situation, I wanted to change the order of quests ive written but in the content editor it all mixed up. I managed it by editing the .json file in a texteditor, afterwards there were no more problems of that kind.
Furthermore an additional button "Clear-all" would be very helpful. Cause i edited Dialogues, quests, items, monsters... in one session and had to clear every single topic. with a "clear-all" button that would be some less count of klicks (Yes im lazy on klicking

)
I encountered a logical problem too; while creating the secret room i put a containerbox in there. When i tested this on my device, AT messed up with it and changed the position of the containerbox. The problem was, that the position of the containerbox was not-walkable. I made it walkable and it worked without problems.
Another question i had about the possibility to replace Object-layers ( I dont mean the Object
s-layer, i talk about the different tasks of Tile- and Object-layers(Sorry, i have the german version of tiled, so i dont know the correct words used in the english version of this program))
Third i noticed some not correct tiles of the "transition"-set; some transitions look very edged. You can see an example for that on the map arulirmountain1 on top of the cave-entrance.
last but not least i asked myself if it is possible to reset quests, means that a questprogress could be set on a lower value (e.g. hero steps on a tile and questprogress is set to 10 - even if the hero already reached queststage 20 or more).
To answer your questions:
When a hero tries to go over the bridge to the east without an arulirskin, this text will be displayed:
"A feeling in your stomache is saying:\n\"It would be better to not go further unprepared.
You need some item which would help you go through there undiscovered."
The other side of the bridge is not reachable yet, its destroyed("The Bridge is broken. It would not hold your weight."). But maybe someday it will be fixed

Lvl: 16, XP: 47538, Gold: 474, RoLS: 0, ElyR: 0, RoL: 0, ChaR: 0, GoLF: 0, ShaF: 0, SRoV: 0, VSH: 0, WMC: 0, GoW: 0
HP: 151, AC: 248%, AD: 29-40, AP: 4, ECC: 22%, CM: -, BC: 160%, DR: 5