-#define MAXROCKS 120 // MAX Rocks
-#define MAXROCKHEIGHT 100
-#define ROCKRATE 2
-#define MAXBLACKPOINTS 500
+
+// -----------------------------------------------------------------------
+// Rocks
+
+// number of rock images
+#define NROCKS 50
+
+// initial/final counts for rocks-on-screen
+#define I_ROCKS 25
+#define F_ROCKS 45
+
+// number of rock structs to allocate
+#define MAXROCKS 120
+