TODO
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* Seralize light on / off and colour selection state across day / night transition
* Night remaining counter
* Eye colour
* Save game
* Five levels
* More sounds

Done
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* Light colour selection
* All lights multicolour
* Light direction configuration
* Fitting rotation
* Sunrise transition screen
* Lose condition (no turnips and no seeds)
* 'End the Day' button
* Win condition
* Mould resistances
* Battery and light power consts
* Mould power increases to prevent farming