1. When the self-violent enemy aircraft dies, the enemy aircraft will not launch dead bullets within 300 pixels of myship.
2. Reduced the wave number of enemy aircraft and speeded up the boss battle.
3. The picture has been optimized.

Version 1.2 update:
1. The difficulty of the game is properly adjusted. We have properly adjusted the previous levels that are too difficult.
2. We have adjusted the problem of less changes in the types of bullets in the previous few bosses.