Its reasonable
Hmm... I better watch my back. you have just made me slightly paranoid of white boards. anyway, the game is pretty good, but after the third level it got boring.
know why? mainly because you're in a helicopter. in games like these, landscape is purely aesthetic, because, you can fly anywhere. Because you're in a helicopter. so maybe make hindrances next time like mountains? or planes? (there might of been planes later on but I didnt get far enough). otherwise it was pretty good.