Level Chooser?

Hello, how do I create a Level Chooser Page like the game in this example? I need a way that the game recording the level a player reached and offer him to start from level xy when he starts the game again. Is that possible for istencyl?

One way of doing it is to make a global list attribute. When a player reaches a level, you could add the scene name (using a scene name getter which can be found under scene > world) to the list.

On your level select screen, you would then make the buttons useable only if a certain "scene name" exists in your list. You could maybe grey out the images for levels that aren't in the list.

where is the palette "Levelsunlocked"?

in custom??? I can not find

The purple one is a game attribute. You can create game attributes under "Attributes" in the panel on the left.

See this Tutorial for unlockeds and lockeds levels.
Tutorial

Emanuele Feronato created a tutorial about how to manage level selection:

http://www.emanueleferonato.com/2011/12/27/manage-saved-games-with-stencylworks/

Note that at the beginning of the above tutorial, there is a link to the previous tutorial which you will also need to read.