environmental citybuilder prototype

Cat Flynn c44ab10712 produce/absorb heat by tile type #6		2022-12-12 23:37:42 +00:00
half-earth	produce/absorb heat by tile type #6	2022-12-12 23:37:42 +00:00
.gitignore	add gitignore	2022-12-03 16:26:13 +00:00
gdd.md	tile-types (#15)	2022-12-10 18:25:00 +01:00