feat: Roses spawn

Assets/Scripts/Domain/Model.cs

@@ -2,12 +2,27 @@
 	public class Model {
 		public int Score { private set; get; }
 
-		public Model(int score) {
+		private readonly int _spawnRate;
+		private bool _needsToSpawn;
+
+		public Model(int spawnRate) : this(0, spawnRate) { }
+
+		public Model(int score, int spawnRate) {
 			Score = score;
+			_spawnRate = spawnRate;
 		}
 
-		public void AddScore(int score) {
-			Score += score;
+		public void AddScore() {
+			Score++;
+			if (Score % _spawnRate == 0)
+				_needsToSpawn = true;
+		}
+
+		public bool NeedsToSpawn() {
+			bool needs = _needsToSpawn;
+			_needsToSpawn = false;
+
+			return needs;
 		}
 	}
 }