diff --git a/final/game.h b/final/game.h
new file mode 100644
index 0000000..4a8df69
--- /dev/null
+++ b/final/game.h
@@ -0,0 +1,49 @@
+#include <stdbool.h>
+#define BLANK ' '
+/**
+ * Function draw game field
+ * @param rows count of rows
+ * @param columns count of columns
+ * @param field hold 2d array of characters in game
+ */
+void game_field(const int rows, const int columns, char field[rows][columns]);
+
+
+/**
+ * Check fields rows if there are same characters
+ * @param rows count of rows
+ * @param columns count of columns
+ * @param field hold 2d array of characters in game
+ * @return true, if columns are complete; false otherwise
+ */
+bool check(const int rows, const int columns, char field[rows][columns]);
+
+
+
+/**
+ * Function returns 2D array after moving characters based on player input
+ * When characters are not same, nothing happens and warning appears
+ * Function also find the most upper character and the lower character from columns
+ * @param rows count of rows
+ * @param columns count of columns
+ * @param field hold 2d array of characters in game
+ * @param x is column from where character should be moved
+ * @param y is column where character should be moved
+ */
+void down_possible(const int rows, const int columns, char field[rows][columns], int x, int y);
+
+
+/**
+ * Function returns 2D array of randomly generated characters
+ * There must be two blank columns and other should be full of characters without '\0' or blank spaces
+ * @param rows count of rows
+ * @param columns count of columns
+ * @param field hold 2d array of characters in game
+ */
+void generator(const int rows, const int columns, char field[rows][columns]);
+
+
+/**
+ * Starts interactive ball sort puzzle game
+ */
+void ball_sort_puzzle();