Features
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+* Turnip / light spacing bug: a light can be placed right below a turnip, but must be much further away if above the turnip. This happens whether the turnip or the light is placed first. I assume it has to do with how the turnip image is positioned relative to its body.
* Allow denser turnip spacing
* Allow going down to zero seeds by buying lights if a turnip is planted
* Maybe make the mould weaker at the start