Update 1.2 - Pausing and UI Cleanup

PATCH NOTES

Gameplay & UI Improvements:

• Made zombies move at a constant speed, no longer dependent on the frame rate.
• Added a pause menu.
• Cleaned up the user interface.
• Changed the wave counter and zombie damage multiplier to be represented by symbols instead of text.

Bug Fixes:

• Fixed a bug where Snow Peas would only freeze a certain number of zombies.

No changes were made to the wave system. I plan to adjust it for balance in version 1.3.