The limitation was announced in their official discord Server;
Limitations for Thailand Horror Jam 2023 are here! Don’t forget to select at least 1 to make your game~ 
Theme: Monster 
Limitations:
- Permadeath: No checkpoint. If you fail, you need to start over.
- Die, Die, Die!: Use dice a mechanic in your game.
- Nowhere Else: Your entire game must happen in one scene.