I made a demo for the game back in early December to release before the Winter Sale, but I have had issues with Steam's backend trying to get it into review. As of right now, it has been released, and is available for everyone.
The demo is only limited by ending once you beat the boss at the end of the game, not going into New Game+ or Prestige mode at all. All other features not reliant on NG+ are available.
There has also been little feedback on how to improve the game, and it is considered feature complete. Future updates can add features if they're suggested, however the lack of interaction and sales means it isn't feasible to do so.
In related news, I am considering giving the game a permanent price cut sometime in the new year, due to low sales, and have decided that the Dark Lady Pinup DLC will also cease to be sold in the near-future.
If more sales are made and there is more constructive feedback around the game's shortcomings and such, I will likely continue work on making these features that are requested… but otherwise, there will likely be no more updates. I have also disbanded the beta testing team in light of the expected lack of support.