I have thought several times when looking through the entries, “This is a cool concept. I wonder what my own implementation of this idea would look like?”
I saw the idea of a Cover Jam proposed once on Twitter, where devs would cover each other’s games the same way bands cover each other’s songs.
A good example of this is Terry Cavanagh’s entry for the FlappyJam. It plays like Flappy Bird but looks and feels like Super Hexagon:
http://terrycavanaghgames.com/maverickbird/
It would be fun to put your own implementation and personal styling on another dev’s idea, just informally, to see how it ends up diverging from the original.