SWEET!
ngl, I've been checking your twitter page every day to see whether 1.5 was released on itch yet.
Sorry for keeping you waiting!
Been tweaking a small change for the custom character feature, which will make it into both the Steam and itch version.
Also been busy with both character DLCs... but those won't be available on itch, I am sorry to say.
But the goal is to have the new version up and ready on Thursday the 19th!
The reason is entirely technical; itch does not have any backend API or infrastructure to support DLCs and such, so the implementation would need to look entirely different... which is to say a lot higher effort.
Alternatively I could include, like, a "Complete Edition" that you unlock by paying more, via Name Your Price; but I am not sure this would be a good solution.