I’m most familiar with Unity, but I’m open to exploring and adapting to other engines if the team feels another engine would better suit our needs or project goals.
Well I'm still not sure if I will join since I do have school during the week of the jam. For now I will not join a team but if you want to add me on discord (vador27) I'll be happy to help you with some part of your game during the jam.
I have some experience with Unity but I am focusing on Godot right now. If you think that you will need my help, tell me some time before the jam starts and I'll re-download Unity.
Edit : Since you're looking for a game designer. You can also send me a message and I can help you with that (Making map layouts, game mechanics and lore / a story for the game...)