I often check JayIsGames for their daily casual game updates. One of JIGs usual events is their annual design competition. Amateur or professional game designers can submit their games for glory and awards. The winner this year is David Shute with Small Worlds. This game won for its interpretation of the "Explore" theme. Give it a try. It's not very hard and you can play with W,A,S,D controls or your arrow keys (you can use up-arrow, "A" or space to jump). Don't be dissuaded by the graphics. It is a great game!
You can play the games by the other contestants on this site as well.