Please tell us about your game here.
We did it in a group of 2 people. We brainstormed the ideas and finally came up with a concept that one of the person is being guided by another one of himself from the parallel dimension, and they are both helping each other.
Also, one of us forgot which game jam we were working for. So he added the concept of 5 minutes. The idea was nice nevertheless, so we went ahead with that.