Playing it again years later brings back the funny little truth about these compact multiplayer games: the mechanics stay put, while everything around them changes. The 2D pixel fights are easy to grasp but leave room for timing and movement to matter, and the custom-map tools add plenty of mileage with friends. The fully unlocked version opens the complete experience, though the strangest part is realising the game has barely changed while the people you used to play it with have.