feat: preview of next shape

src/main/java/eu/midnightdust/yaytris/game/Space.java

@@ -16,23 +16,27 @@ public class Space {
 
     public Space() {
         gameMap = new Color[14][8];
-        nextShape = getNextShape();
+        nextShape = generateNextShape();
         score = 0;
     }
 
     public void spawnTetromino() {
         currentTetromino = new Tetromino(nextShape);
-        nextShape = getNextShape();
+        nextShape = generateNextShape();
     }
 
     public Tetromino getCurrentTetromino() {
         return currentTetromino;
     }
 
-    public TetrominoShape getNextShape() {
+    public TetrominoShape generateNextShape() {
         return TetrominoShape.values()[random.nextInt(TetrominoShape.values().length)];
     }
 
+    public TetrominoShape getNextShape() {
+        return nextShape;
+    }
+
     public int getMapWidth() {
         return gameMap[0].length;
     }