Any Ideas?

i'm working on a beat'em up style platformer game (like altered beast) where the player battles his/her way through different themed "realms" (basically levels) each with 4 stages, a boss at the end, and an assortment of mini-games throughout the stages with different gameplay styles, and i need to know if theres anything more i could add to this game. Any suggestions will be appreciated

If you're a beginner, keep in mind that you may find larger games more difficult (trying going for a minimum viable product). However, if you've done of all of this and are asking for more suggestions, do you have any post-game content in this game? If not, I would recommend doing this.