Weaver updated to 1.1, new content added

Since jam submission voting is over, I have updated the game, adding much needed polish and additional content.

Changelog:
- Added upgrade icons
- Added UI icons
- You can now pause the game by pressing "Esc"
- Web life upgrade also slightly lowers the chance of web tearing when feeding
- When difficulty rises (every 5 levels), player gets bigger and gets +1 to health pool and +1 to juice pool
- Added walking sound effect
- Added cave ambience background sound (credits)
- Added a chance for a golden fly to spawn
- Added cursed flies
- Added golden and cursed webs
- Added apple upgrade which can be offered on level ups since achieving level 5. Be careful, these might get cursed!
- Slightly adjusted sound levels
- Fixed backwards movement acceleration being faster than it should be

This is it for now but there are still few things I'd like to add in the future like completely new kind of insect, more upgrades and improved graphics. Thank you for playing, please let me know what you think of new content!