#define EL_WALL_AMOEBA_END EL_WALL_63
#define EL_WALL_END EL_WALL_63
#define EL_BLOCK_WOOD 96
-#define EL_BALL_GRAY 97
+#define EL_GRAY_BALL 97
#define EL_BEAMER_START 98
#define EL_BEAMER_00 (EL_BEAMER_START + 0)
#define EL_BEAMER_01 (EL_BEAMER_START + 1)