This is a simple casual game. There aren't hundreds of levels. You only need to complete 10 levels to finish the game. If you can reach level 10 and avoid or destroy the last 100 asteroids, you can finish the game and unlock the ad-free version. If you can manage it :) You earn 1 point for every second you survive, 10 points for every asteroid you destroy, and 200 points for every enemy ship you destroy. Your level is determined by your score: 0 Level 1 100 Level 2 200 Level 3 500 Level 4 1000 Level 5 1500 Level 6 2000 Level 7 4000 Level 8 7000 Level 9 10000 Level 10 The game gets a little harder as you reach higher levels. However, your firepower also increases at higher levels. You have 3 lives at the beginning of the game. If you lose all your lives, you can restart from the beginning of the last level you reached. Or you can return to the main menu and start from Level 1. The first game of each new day is ad-free. Or, when you break a new record, the next game will also be ad-free.