second? enyways... nice game, nice music, but the end boss tends to be very unfair at times, it corners you without having an option to jump or wait until it jumps so you can pass below as sometimes you can.
nice... i don't know what kind of game is, nice music and animation but it has no ending. Or after getting to the goal happens anything other that returning to the main menu?
the obsidian blade is inside the closed cave. get 5 obsidian spheres using the metal detector, then go to the closed cave, dig two piles of dirt and then put the spheres following the patterns on the cave door, one at a time. inside is the blade.