Congrats Really nice game and graphics well done,
just to let you know that I test it on iphone 6 and on the first try I fly up and when the spaceship was going down the ship turned around to the opposite side and landed like that, i couldnt move becouse the impulse was pushing to the ground angle, so i couldnt find any button to reset the level or anything like that, i had to log of and in again
And the second thing when the add showed there is no way to close it down even i waited a few minutes and nothing, i had to log of and in again, this happened twice with the same add, and the last try i log out and in many times the add was still stack on the screen
i thought just to let you know because can make the the players frustrated, wish you all the best i hope you get huge succes
Edit : Still happening the problem with the add, there is no way to close it down and carry on playing this time with different add