Thanks for letting me know. I have looked into the matter. I guess it was because I wasn't much clear about the controls. The "UP" button or 8 on numpad does work but only when you are not flying too high. You can see this through the animation. I don't know why the buttons on your side don't work sometimes. I am guessing that it is because you are playing too fast. you have to wait 0.5 sec for the animations to get over for the same. I have fixed some bugs such as the plane going out of the lanes and made the game a little more difficult. I have also added some more controls and exported it to various platforms. Please try one more time after reading this. I hope I have fixed all the bugs.