Having a sewerdream.

You have a month. Make your dreams come true.

Option I

Crush or make your dreams. Think of how to compress the core of what your dream game is about and make something playable in one month. This can mean making a prototype with the main features you want working, or the whole game but compressed and complete.

Option II

You close your eyes but no game shows up. Think of the past, what have you tried making before but couldn't? Make it now.

Option III

Living blissfully in the present, you aren't pining for future games and aren't haunted by regrets of the past. Roll the dice for inspiration once or thrice and get jamming (or just jam to your heart's content).