I maxed out everything and unlocked all planets without much effort and without using ads to upgrade, the game is pretty easy to beat without much time or effort, the amount of content is enough as to not get too repetitive and the ads have appropriate placing as to not disturbed the gameplay, the game is also very creative and fun to play. Perhaps the difficulty and graphics could be improved but other than that it’s a really simple and fun game to play outside or when bored.