Fix bugs.

Fix bugs.

2020 New Year Version

Added Christmas theme;
Added Christmas event;

Fix bugs.

1.Fix some unknown bugs.

1.Added new skin
2.Added new effect
3.Added plane exchange;
4.Added next day reward
5.Fix bugs

1.Optimize UI display;
2.Adjust monster effects;
3.Added the effects of weapons;
4.Optimizing Attack Effect;
5.Some fix bugs;

1.Optimized monster AI
2.Optimized player experience
3.Optimized boom effect
4.Optimized bullet flying
6.Adjust weapon attack
7.Adjust boss level

1.New UI interface；
2.Adding some game props；
3.Update some skin；
4.Fixed bugs；

Added revive items;
Optimizing weapon upgrading;
Skins and special effect display;
Optimizing difficulty coefficient;

1. Optimized some display problems；
2. Fixed some bugs
3. Adjusted buff occurrence probability；