Adds a second stage for ascending.

constants.py

@@ -5,3 +5,13 @@ ROOM_MAIN = 1
 ROOM_END = 2
 ROOM_NEXT = -1
 
+
+# The first part of the level, where we are reaching the water
+DESCEND_STAGE = 0
+# The transition to the second part of the level, where the camera travels
+# back to the surface
+WATER_STAGE = 1
+# The second part of the level, where we are growing into the sky
+ASCEND_STAGE = 2
+# The "level complete" animation
+BLOOM_STAGE = 3