+/* default input keys */
+#define DEFAULT_KEY_LEFT KSYM_Left
+#define DEFAULT_KEY_RIGHT KSYM_Right
+#define DEFAULT_KEY_UP KSYM_Up
+#define DEFAULT_KEY_DOWN KSYM_Down
+#define DEFAULT_KEY_SNAP KSYM_Shift_L
+#define DEFAULT_KEY_BOMB KSYM_Shift_R
+#define DEFAULT_KEY_OKAY KSYM_Return
+#define DEFAULT_KEY_CANCEL KSYM_Escape
+
+/* default shortcut keys */
+#define DEFAULT_KEY_SAVE_GAME KSYM_F1
+#define DEFAULT_KEY_LOAD_GAME KSYM_F2
+
+/* values for move directions */
+#define MV_NO_MOVING 0
+#define MV_LEFT (1 << 0)
+#define MV_RIGHT (1 << 1)
+#define MV_UP (1 << 2)
+#define MV_DOWN (1 << 3)
+
+/* values for button status */