update adds tsar bomba into endgame haha very cool

• Added endgame powerup shop (tsar bomba, fire ring, slow motion)
• Suspicious square required to spawn metal square boss is now much more common
• Game now pauses when a menu is open
• Added new splashes to main menu
• Added the ability to replay tutorial
• Reduced upgrade prices
• Unified coin display
• Swapped trophy and settings buttons in main menu
• Decreased GUI scale
• Explosives should no longer multi-activate