Thanks for the help, but i find some other solution, i took 10 different sprites, one for every level, then add few events like
system.every tick - set opacity to 40 for all level boxes in the menu.
Then i added few events on every level.
When level 1 is finished - add 1 to "unlock level2" (global variable)
Again in the menu events i added,
If Unlock level2 = 1 - then set level 2 opacity opacity to 100% and
On levelbox2 clicked, and -
levelbox2 opacity is 100% - system go to level 2
and so on for every level.
Thanks for the help again