Added sound indicators for gas in vents

Fixed the frontroof. Also back to ugly shadows out of performance reasons.

Added a lot of details.

- A new music room has been added.

- Anu's Tomb now works as intended.

- Vegetables now heal different amounts of HP.
Mushroom < Tomato, Onion, Carrot < Pumpkin

- Toasti can now be turned into soup and restores 100 HP.

- The soup cooking sound can now be heard across the entire map.

- Some barrel hitboxes were missing and have been fixed.

- Sounds from the labyrinth are now more audible.

- Various small bugs have been fixed or adjusted.

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