Hello!
Thanks for trying some of my games.
Some games, like Idle quest for epic loot, are multiplayer, and I need to be able to distuingish between players (the save data is stored in the unity gaming cloud service to prevent local editing/hacking of save data), so they have their dungeon/inventory/heroes linked to that account, There are some other multiplayer games like Stargrid and Cardbound, those offer an anonymous login which just saves the data for a selected amount of time so players can try the game without account to see if they like it. I didn't do this for Idle quest for epic loot as it was for a gamejam and I kinda run out of time.
If you like the Idea of Airship Architect, it was also a gamejam game and a precursor to what stargrid turned out te be. Stargrid is my main game, it took some years of development. Idle Delver III is another game that's close to complete, all the others were shorter unfinished and sometimes gamejam projects
I hope this answers your questions :)