BUG fix

• [p]Fixed the problem that the enemy did not become stronger after 30 minutes in the endless level[/p]
• [p]Fixed the problem of incorrect calculation of the survival time record in the endless mode[/p]
• [p]Fixed the problem that the auxiliary equipment CD was not displayed correctly after turning on the time machine[/p]
• [p]Fixed the problem that the advanced task of purchasing the time machine could not be completed[/p]
• [p]Fixed the problem that some special effects disappeared prematurely[/p]
• [p]Fixed the problem that the special effects of incendiary grenades were too bright[/p]