It depends what theme you want to work with. But based on your name, Mage slayer, here's a quick idea: what about a typing game where you have to type some words quickly to counter a mage's spells. If you fail, you lose a piece of closing. If you manage to type the words on time, you land a counter-attack, defeat the mage, save the prince 😄
Sure no problem. Its been ongoing for several years now and always starts in October. https://itch.io/jam/barajam-2023