environmental citybuilder prototype

Cat Flynn d431848791 wild tiles can heal		2022-12-22 01:10:30 +00:00
half-earth	wild tiles can heal	2022-12-22 01:10:30 +00:00
.gitignore	add gitignore	2022-12-03 16:26:13 +00:00
gdd.md	update docs	2022-12-21 22:51:51 +00:00