I am glad you like it. Each character will have their own masteries and their own gameplay, because even if the game is inspired by Vampire Survivors, I will create characters with gameplay differences instead of just changing their stats.
And yes, I will add bosses in the future, right now I'm thinking of a boss for appear at the half of the round and then one at the final. The final one will be a "Monster Invoker" and he is the reason why the dungeon is so infested with monster, once is defeated, the player win the game.