This update fixes minor bugs

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-Changelog 0.2.7a 
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   - BUG FIXES 
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- Fixed a bug where the game would crash on some machines while tabbed out, the game will now pause when the window is not in focus
- Fixed the backwards knockback
- Removed the menu close sound effect if the menus are not open and tab is pressed
- Fixed a bug with the starting weapon upgrade
- Days are no longer saved, and you will always restart on day 1