First draft Game Jam topic

Author: leereilly

topics/game-jam/index.md

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+---
+topic: game-jam
+aliases: gamejam
+display_name: Game Jam
+related: hackathon
+short_description: A game jam is a hackathon for creating video games.
+wikipedia_url: https://en.wikipedia.org/wiki/Game_jam
+---
+Game Jams challenge people to create games within a short period of time (usually over a weekend, a week, or a month) and with certain constraints like limited color palettes, file sizes, themes, etc.