plusieurs amélioration mineure du gameplay et de la qualité de vie

entities/plants/scripts/plant.gd

@@ -2,7 +2,6 @@ extends Area2D
 class_name Plant
 
 const PLANT_AREA_WIDTH = 10
-const PLANT_SPRITE_SCALE = 0.15
 const HARVESTED_SEED_POSITION_RANGE = 100
 
 const RANDOM_MAX_GROW_INTERVAL = 0.4
@@ -55,9 +54,11 @@ func set_day(d):
 	if day == 0:
 		change_state(State.PLANTED)
 	if day > plant_type.growing_time:
-		change_state(State.MATURE)
+		if state != State.MATURE:
+			change_state(State.MATURE)
 	else:
-		change_state(State.GROWING)
+		if state != State.GROWING:
+			change_state(State.GROWING)
 
 func change_state(_state: State):
 	state = _state