As far as difficulty goes in my experience most games are easy at first to have a low barrier of entry to the game itself because nothing is worse than a new player putting the game down after dying in the first few minutes. Roguelikes like slay the spire, ring of pain and even non-roguelikes like dark souls all start off easy allowing new players to clear massive amounts of content in the first run and encouraging them to do another run to do better. For experienced players these games are easy in the beginning but allows them to perfect strategy and focus on starting a build, although it is still possible to die even for them. I only bring these examples up because they have massive replayability while also having easy beginnings.
All the plans sounds great and new floors are a must! Best of luck getting it done :)