How many playable characters are available in Black Future '88 and what is their significance?

There are 5 playable characters in Black Future '88, each with their own unique buffs and weaknesses, allowing players to choose different play styles.

What unique challenges does the gameplay in Black Future '88 present?

The gameplay features an evolving procedural tower with numerous challenges including deadly traps, homicidal AI, crazed junkies, and colossal Wardens that players must overcome.