What engine? Unity, Unreal (if they do 2D) or Gamemaker studio?
People can use any engine they want.
I'm planning on using either PICO-8 or TIC-80 for this. Makes it easier to stick to the gamejam rules that way.
Cool
I'm thinking exact the same, also because it's easy to export to html game
Game Maker for this cat. But I’m learning Godot so I will be using that for some future jams