Its a pretty fun wrinkle on the "vampire survivor" formula with you raising minions rather then upgrading your own attacks. Its a bit easier then vampire survivor as upgrade paths are less rigid and its a lot faster unlocking most upgrading. Perhaps the most interesting feature is the ability to not only upgrade the player but also upgrade the enemy: unlocking new enemy types, giving old enemy waves new attacks, and increasing the frequency of high level opponents spawning. On higher level NG+ runs the screen becomes basically unreadable which basically means sitting in one spot between all your minions is the best strat, which basically underlies this genre's roots as a clicker game.