Changelog:
- Added new Main menu background obtained after finishing the game
- Added option to select Main menu background. This is in Options menu and it's obtained after finishing the game
- Added Ice Frogs to a few previously empty ponds
- Fixed being able to bring two frogs in Level 23 home
- Moved Level 23 pond more to the right
- Few small fixes in Level 23
- Fixed backpack outline sometimes being fully bright for a frame when backpack is dropped
- Fixed Main Menu Ice Frogs icons sometimes not displaying