Glad you enjoy the game!
As of v1.6, there shouldn't be any passwords on the zip. If you're playing the one with password then you're on the older version (v1.5). Maybe you'll want to try the newest version and see the differences.
For now, we're working on new contents such as characters and stages. As for online mode, unfortunately it's impossible for us to implement it in this ancient engine (2DFM). There's an online play plugin called LilithPort written for 2DFM games, but we usually use Parsec instead.