The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane. The goal of the game is to complete all three levels, destroying enemy planes. Enemies will gradually become stronger and in order to resist them the player will have to improve his plane.