Duke Dashington ($0.99) released a couple of weeks ago, and I enjoyed the game, but thought that there were some additions that could be made to the game to improve its longevity, without necessarily adding new content. The developer, Adventure Island, has promised that they were coming in an update, and they have delivered: Duke Dashington 1.1 is out right now, bringing a new time trial mode and Game Center to the game.

The Time Trial mode involves rushing through the 30 levels in one of the four worlds as quickly as possible, with the game keeping track of time and deaths. Deaths will be the big determinant for level times, though there’s plenty of room on the margins for competitive types to not dawdle in levels. But if you can manage to beat any of the worlds without dying, you deserve the high leaderboard spot you get.

There’s Game Center leaderboards and achievements, though these are all for completing one of the four worlds, completing it in time trial mode, and completing it without dying. Still, these are all welcome additions, and do a lot to add to the replayability of the game. As well, if you have an older device like the iPod touch 4th gen, the game’s playable on them now, so get after it!