Thanks for the fast reply, it's better now. But it hasn't fixed my problem. Example number 1: I start the game, press [ESC], see my level is 1,and press [ESC] again. Now i can start the game by clicking on start.
Example number 2: I start the game and play a while. I level up (no matter how many) and die/press [ESC]. On the game over screen i see, that my level is higher than one. I press [ESC] again, but now I can't click anything in the menu! That's my problem.