Monster Feed is a Tower Defense game with a bit of magic thrown in.  It is priced at $1.99 (a dollar more for the iPad version), and a free light version is available for trial purposes. 

Where this game departs from other in the TD genre is its use of “spells” in your attacks.  You are not just limited to the towers you place to keep the invading monsters from reaching the yummy deer, but you also shoot spells at them.  Different heroes have different spells.  But your monsters have added powers as well.  For example, spiders can jump parts of the path.

In a way, it seems as if this added complexity tries to take the traditional tower defense game to a new level in the same way that something like Defender Chronicles would.  But I believe it fails in that it has changed the popular TD formula to the degree that it has becomes something different and a bit cumbersome.  At half the price, I think Defender Chronicles does a much better job of mixing new ideas into the TD genre.  It might work better though if you approach this game as an RPG with TD elements as opposed to a TD game with RPG elements.  In its current implementation and price point though, it is hard for me to give this title high marks.  But, that may just be a personal preference thing as the game does have a 5-star rating (albeit with low numbers) in the app store.  It seems to be one of those titles that folks either really love, or don’t care for at all.  So, if you like Tower Defense and/0r RPG games, I’d suggest grabbing the lite version and taking this one for a spin.