Check out the example of a game with open roles. It seems pretty straightforward there :) It's challenging, yes, but I tried not to make it too complicated by introducing something new or special features... the website I linked to as an example hosts Mafia games that are much more complex than ours :)

Added 27 minutes later

P.S. Veg, is it okay that in that Mafia game, there was a choice of roles at the beginning, and then they released the nD?).. although I guess I haven't fully figured it out yet; it will become clear as the game progresses.

This is just an example of a game. Besides, there's a game theme there, and here it's just a workshop ;) Here, you can say, it's the backstage of the game, which can be subjected to balancing. The beautiful and delicious things will be in the game theme, as a dessert :)