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Use one of these words. Or several. Go!!!!!!! =)

You can discuss to brainstorm here, or to share ideas that you won't develop.

I'm not sure about ideas for one button without mouse.
I have idea only for idle games.

PS Looks likes the next jam name is: Zero-Button Jam 2020

Actually, we already had a 1 button jam last year and got very good entries:
https://itch.io/jam/1-button-jam

Those games may be tough to make, but are still perfectly doable =)