* Maybe configure lights in separate json file, to allow reuse of consistent models in multiple levels?
* Allow going down to zero seeds by buying lights if a turnip is planted
* Maybe make the mould weaker at the start
-* Different prices for different lights
-* Different power usage for different lights
-* Calculate both from # of colours, speed, beam width, etc.?
* Display power usage when lights are bought? Also other properties.
* Maybe also display information next to existing lights (on click?)
* Generally balance the levels better and add more levels
* Bug: Crash when removing a rotating light
* 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
+* Different power usage for different lights (this was already done)
+* Different prices for different lights
+* Calculate both from # of colours, speed, beam width, etc.?