Finally have my idea
With 12 hours down I finally have my idea 
I had a neat idea for a logical puzzle game, but it didn’t seem very fun, and a smart interface would have been really tricky to come up with. The idea was that you essentially have to work out the evolution backwards. So you’re given a modern creature, and you’re shown the earth’s “original creatures”, and you have to work out how the original creatures combined over time to form that modern creature. It’d be played with these “cards” that represent each creature.
Anyway, my new idea is more of an homage to an old Starcraft custom map called “Evolves Madness”. Basically it’s gonna be an super-simplified RTS game that takes place on a small map with 3 players, where each player’s base is constantly spawning creatures, and once in a while you send them to attack other players… As you rack up kills, you can upgrade your creatures, research special abilities, and do other fun stuff(?). Your goal is to destroy the both of the other bases. I don’t know how far I’m gonna get, but it’s gonna be a good stress test for my Futile engine at the very least.