Update v1.0.156

- Added animated decorations to cave menu backgrounds
- Added section for advanced options
- Added "Advanced Jump Down" option - enabling it requires pressing "jump" key in addition to "down" key for jumping down from a platform
- Fixed being able to click "watch walkthrough" button in cutscene levels
- Fixed situations where backpack would get stuck on ground under flies
- Fixed Level 4 possible box stuck spot
- Fixed Level 7 two possible box stuck spots
- Fixed Level 23 backpack being stuck in an endless loop because of the flies in the left half of the level
- Fixed Level 26 two possible box stuck spots
- Fixed minor errors in maps' sprites