Well I've yet to play this myself but from what I've heard it is definitely worth checking out for the hefty price of £0.00.

Todays free game that's worth checking out is: Wheeler's Treasure.

Objective
You have to travel as many yards as you can!

So, you're following a giant wooden wheel that's supposed to lead you to treasure. You roll through a randomly generated world fighting enemies and collecting loot. You can use the wheel to shield yourself from enemies, avoid hazards, swing, jump, and more. The wheel can be destroyed during the course of the game - but you can always pay for repairs with the loot you've collected.

Items
There are sixteen collectable items in the game and each one offers a unique ability, you can drag them onto your character in your equipment screen - permanently enhancing her abilities. Collect stylish hats, boots, eye patches and pocket watches, even fake beards, each one alters the gameplay.

Online functionality
This one uses OpenFeint for achievements and scores, though it's not just the standard dashboard. You'll see tombstones in the world where your friends and others have perished. Get past their tombstone and you know you've beaten their score.

Screenshots/Videos

Youtube video here: http://www.youtube.com/watch?v=BhsoLjQoVJQ

Conclusion
It's pretty hard to come to a conclusion yet as I've yet to play it however it looks good and with the online features I'd say it's a no brainer to get this one. I must add that this game is free for TODAY ONLY, so grab it quick!