Well after almost a year, I was finally able to merge 2 planes and what a colossal disappointment they are! After countless hours playing the game watching the stupid ads (basically 30 ads or more a day). This is a total pay to win as unless you have some serious money, you have a long and frustrating path to get anywhere. The basic tier 2 plane is no more powerful than a fully upgraded tier 1 plane. What a waste of time this experiment was!!! Beware!!!! Total waste of time!!!