scoring now like NDS, also filled pieces on the sides

Tetris.ino

@@ -36,6 +36,7 @@ bool holdPressed = false;
 bool holdLocked = false;
 
 int level;
+int prevlines = 0;
 int clearedLines;
 unsigned long score;
 
@@ -87,21 +88,31 @@ void addScore(int numLines) {
   int points;
   switch(numLines) {
     case 1:
-      points = 40 * level;
+      points = 100 * level;
       break;
     case 2:
-      points = 100 * level;
+      points = 300 * level;
       break;
     case 3:
-      points = 300 * level;
+      points = 500 * level;
       break;
     case 4:
-      points = 1200 * level;
+      points = 800 * level;
+      if (prevlines == 4)
+      {
+        points += 400 * level; // 3/2 like Tetris DS
+        drawBack2Back();
+      } else {
+        drawTetris();
+      }
       break;
     default:
       points = 0;
   }
-
+  if (numLines > 0)
+    {
+      prevlines = numLines;
+    }
   score += points;
 }
 
@@ -302,6 +313,23 @@ void manageGame() {
   }
 }
 
+void drawTetris()
+{
+  arduboy.setCursor(WIDTH / 2 - 16, HEIGHT / 2 - 5);
+  arduboy.print("Tetris!");
+  arduboy.display();
+  delay(dropDelay);
+}
+
+
+void drawBack2Back()
+{
+  arduboy.setCursor(WIDTH / 2 - 16, HEIGHT / 2 - 5);
+  arduboy.print("Back to Back Tetris!");
+  arduboy.display();
+  delay(dropDelay);
+}
+
 void drawBackground() {
   arduboy.drawBitmap(0, 0, background, WIDTH, HEIGHT, WHITE);
 }