I`m back.
I couldn`t speak cause i had some problems with the keyboard.
Thank you The_Fifth_Horseman for your help. I restarted the game at medium difficulty and i finaly caught that UFO type 3. The more difficult it is the more fun you get. I`l try the superhuman after I complete the game at medium difficulty.
I will return often now. I will register but please tell me what are the benefints.
See you all.