AppAdvice has teamed up with Dynamic Pixels in order to offer you a chance to win one of six promo codes for Goal Defense ($0.99) for iPad, iPhone, and iPod touch.

Dynamic Pixels enjoys putting their own comical spin on games, such as Pick a Piggy, and that certainly holds true for their recently released tower defense game, Goal Defense.

The Golden Bowl honors the best of the best, but this symbol of triumph is in danger of vanishing as a group of disgraceful athletes has begun making attempts to destroy the trophy. Commanding a small team of mixed sport athletes, you must help defend the trophy and all that is good and fair in the world of sports.

Your team consists of a brutal boxer, potent pitcher, chippy cheerleader, brisk batter, and destructive discobolus. Of course, you’ll need to deploy these players strategically as each has strengths and weaknesses, plus limited team resources.

One of the major differences of Goal Defense compared to most other tower defense games is that even though each wave has a predetermined route, the AI will adjust its attack approach based on your defense positions.

In addition, the opposing athletes have some big tricks up their sleeves. Not only do they have varied players, such as powerful football players and slippery jump ropers, but vans may drive onto the field and deploy enemies at unforeseen locations.

It’s going to be a tough competition, so get ready to rumble! Goal Defense features 40 levels, multiple waves per level, upgradeable characters, dynamic gameplay, power-ups, “boss” waves, as well as cartoon-style graphics and sounds, and Game Center integration.

To have a chance at winning one of two Goal Defense promo codes, just hit that tweet button near the bottom of this page or retweet this post from your favorite Twitter app before July 20 at 11:59 p.m. PDT. We will then search the Twitterverse for all of the retweets and randomly choose our lucky winners. The winners will be notified via Twitter, so please be sure to follow us so we can send you your promo code via a direct message.

Non-Twitter users and those of you who want to increase your odds of winning can leave a relevant comment below before 11:59 p.m. PDT tonight to have a chance at winning one of the other four Goal Defense promo codes. If you do make an entry via the comments area, please be sure to also check your junk email boxes so that you won’t miss out if you win.

Feel free to participate in the giveaway via either or both methods. Only one entry per person per method is allowed, totaling up to two entries per person if using both.