There are many AI types you can use to help you to make a game, but today AI will not really think for game development
Today only some AI language model (like chatgpt) can generate a game alone (with your help and a software of code or game devolpement)

You need to use several tool for making a game, so not only AI content generation tools 
I go to show you some AI and tools to make your code, text, visuals, audio, etc.

For search AI modelhttps://huggingface.co/

   AI tools
      - OpenAI Codex
      - Tabnine
      - CodeT5
      - Polycoder
      - Cogram

TEXT
   AI tools
      - Chat gpt
      - Deep ai Text Generation
      - InferKit
      - Magic Write

VISUAL
   Tools
      - Krita
      - Gimp
   AI tools
      - Midjourney
      - Stable diffusion
      - Dall e 2
      - Nightcafe
      - Lexica
      - Photosonic
      - This Person Does Not Exist
      - Removal.ai (for remove the background )

AUDIO
   tools
      - Audacity
   AI tools
      - Magenta  (music)
      - Soundraw.io (music)
      - Ecrett Music 
      - AIVA (music)
      - Amper Music
      - NSynth: Sound Maker (sound effect)

OTHER: 
   - dain app ai ( for animation interpolation)
   - upscale ai ( for upscale)

GAME engine
   - godot 
   - unity 
   - unreal 
   - monogame 
   - construct 3
   - gdevolp
   - renpy (for visual novel)
   - defold
   - heaps io

Tips
1 do your own research AI change really fast

2 some prompt "create me a game pitch for itch io", "ui ux", "concept art", " sprite sheet", "character sheet", "game design"

3 some program is very similar to AI (for creating automatically), like kumoworks the program of Ghibli formake cloud automatically with sevrale option, think to see program too (for example search in itch io tools with the tag "generator")

4 using at least one ai is the principle of jam

5 HAVE FUN 🤗GOOD JAM EVERYONE

Sorry for my bad English, I not a native speaker😔