Just launched the demo of my first big game project. It's heavily inspired by old shareware platformers from the 90s with simple, low res graphics, MP3 soundtrack of royalty free music and a story about the heroine rescuing her friend. As of now I have two full levels and a boss fight done along with an intro cutscene and shareware style advertisement/teaser screen for the full version.
I coded this entire thing by hand in GMS2 and it was first time I've coded something as complex as a full platformer with working physics so it might a little stiff, but I think that adds to the cheap shareware feel I was going for if anything.