Hi Ako! I'm glad you like the ideas.
The nodes will be like branching levels—imagine something similar to Slay the Spire, except instead of being a "roguelite," it's something where you can move forward or go back. It's a bit hard to explain with words, but once you see it, you'll get it.
As for your powers carrying over between nodes, for now, there won't be a way to "save your powers." Instead, I'm planning to do something quite different, but that will come in the update after this one (meaning, in v0.4.0).
I really liked your idea of putting the version number somewhere on the screen; it's quite logical and it hadn't crossed my mind until now, haha. Thanks a lot!
Finally, I'm looking forward to seeing how you will mod the game with the new things I'm adding!