Metroid 2 is a decent game for the time period it came out in.  It is enjoyable playing as Samus hunting down all the metroids in 6 different areas. The only thing that really hurt the game was the lack of free roaming exploration.  There is no backtracking in this game.  Once a player has killed all the metroids in one area and found all the gear there was no point in spending any more time in that zone you just keep moving forward where the lava blocked your path.