Add grass biome and replace old grass with new plains

src/arena.ts

@@ -99,6 +99,8 @@ export class Arena {
 
   getBiomeKey(): string {
     switch (this.biomeType) {
+      case Biome.TOWN:
+        return 'grass';
       case Biome.TALL_GRASS:
         return 'grass';
       case Biome.CITY:
@@ -127,6 +129,7 @@ export class Arena {
 
   getTypeForBiome() {
     switch (this.biomeType) {
+      case Biome.TOWN:
       case Biome.PLAINS:
         return Type.NORMAL;
       case Biome.GRASS:
@@ -199,6 +202,7 @@ export class Arena {
 
   isDaytime(): boolean {
     switch (this.biomeType) {
+      case Biome.TOWN:
       case Biome.PLAINS:
       case Biome.GRASS:
       case Biome.SEA:

src/battle-scene.ts

@@ -24,7 +24,7 @@ const enableAuto = true;
 const quickStart = false;
 export const startingLevel = 5;
 export const startingWave = 1;
-export const startingBiome = Biome.PLAINS;
+export const startingBiome = Biome.TOWN;
 
 export enum Button {
 	UP,