add updateScore method

src/newMode.ts

@@ -108,7 +108,7 @@ class ViewModel {
     }
 
     reduceScore() {
-        this.stats.incrementScore(-1);
+        this.stats.updateScore(-1);
     }
 
     resetScore() {

src/statistics.ts

@@ -14,16 +14,26 @@ export class Stats {
     incrementScore(value = 1) {
         this.#score += value;
 
-        if (this.#highScore < this.#score) {
+        this.checkHighScore;
-            this.#highScore = this.#score;
-            localStorage.setItem(this.#highScoreStorageKey, this.#highScore.toString());
-        }
     }
 
     resetScore(): void {
         this.#score = 0;
     }
 
+    updateScore(value) {
+        this.#score += value;
+
+        this.checkHighScore;
+    }
+
+    private checkHighScore() {
+        if (this.#highScore < this.#score) {
+            this.#highScore = this.#score;
+            localStorage.setItem(this.#highScoreStorageKey, this.#highScore.toString());
+        }
+    }
+
     get highScore(): number {
         return this.#highScore;
     }