This game was to easy what are you all complaining about. You get money way to fast. You dont need it on the way down. You can easily notice the fuel upgrades by the end. As soon as i got my fourth updrade for everything i had enough money totall to still max out my stuff before i even had all 30 questes done. And i could get my boost and fuel going for much much longer even without fuel barrels for refilling while going up. The game is too easy and needs to be harder. I can get over 300k Height like nothing. Seriously how could you think you need better fuel upgrades or more money. Its just retarded and you would have to suck pretty bad at this game.