Yeah as the title says I’m going tell you what I’ve planned for the next few updates.
(Not in chronological order)

• Names and Scoreboard(GameJolt API integration) and save system.

• Minigames?

• AU Characters(from UnderSwap, UnderFell etc.)
  -Easter Eggs?

• Balancing(Less dtc, dts lower prices but more characters and more.)

• More songs from the UnderTale(and from other AUs) Soundtrack and maybe some fan remixes

• Visual Improvements

• Android and Apple Smartphone Ports(idea)

• Community Ideas and Improvements(FEEDBACK NEEDED)
  So these are all the things I want to add and you also decide what you want in the game, so please leave some feedback and/or some ideas! Thanks! Have a nice day!