For the competition theme this year, you could pick from one of three verses. I chose the Hosea 6:6 verse which says something like, "For I desire mercy, not sacrifice, and acknowledgment of God rather than burnt offerings."
|Yer a pirate yarg!|
In my game you're player is a pirate and you go around collecting treasure and fighting while running from the King's men. At one point you get caught, told the truth and are given the option to be pardoned and join the King's men or be banished. After you join the King's men you are given a new sigil, clothes and a mission to recover the King's treasure/keep the peace and offer the same deal to any other pirates you encounter. Get it? I know, I'm no C.S. Lewis, but it's one of my favorite CDN game ideas so far.
|Pirate sprite sheet|
I used Tiled for making the levels, photoshop for all the art and did my coding in Sublime.
If you have to chose a platform for a web game, I'd say Phaser is one of the best I've seen, but if you don't really care so much about open source and not needing any plugins you can always join the herd and head over to unity3d.com