Ah okay, so that means there's no postgame and the "true final boss" theme is unused, then? I was just curious.
Also, if the boomerang sword is supposed to be the strongest, you should look into rebalancing it because it dealt less damage per hit than the bomb. It could maybe have dealt more damage if a single sword-toss could hit the final boss more than once, but that doesn't happen. At best, I was only able to hit the final boss twice-at-once with the boomerang sword if I was suicidally-close enough, with the initial swing counting as a separate hit from the thrown-sword, but no matter how or where I threw it, the sword-projectile itself would never damage the final boss a second time until it returned and I threw another one. At the time, I assumed this was an intentional way to avoid cheesing the fight, and maybe it was, but you should know that it has the side effect of making the bomb the strongest powerup in the game.
And to top it off, the bomb also has a faster rate of attack since you can throw another one right when the previous bomb is done exploding.
Oh, and speaking of the boomerang sword, it'd be nice if pushing the attack button locked in the direction the player is facing until after the sword is thrown. That way, we can push the button and immediately run away from an enemy while still throwing the sword at said enemy.
EDIT: I thought of a way you could make the Teleporer Maze a bit less painful: make the process of teleportation itself faster. Right now, the player just kinda floats there for around half a second before being sent to the OUT machine; I'm sure you could speed that up by 2x or so.