New update, v0.35.01. Adds a ton of features:

Multiple save slots, 5 new games including a Metroidvania style game, an epic boss battle, new special events system with 4 new special events, new stage variation engine applied to multiple early games, a new full arcade system applied to 4 arcades, a new star item that lets you pick whatever game you always want included, a new speed run mode, and a new insane mode.

Full release notes here:

https://store.steampowered.com/news/app/3412560/view/507326880609730935