I am not sure about the meaning of the phrase "brains to spare" in the following sentence:
Factor in a smattering of stylus minigames - including a terrific dash to piece together a cantankerous rag doll zombie - and Teenage Zombies seems to have brains to spare.
This is from a game's review. Here is a preceding paragraph:
Play itself is slightly more by the book - or, given the bookish style, less by the book. There's a trio of teenage zombies each with, you guessed it, unique powers that help overcome individual obstacles. What should be rather tired is kept fresh - or rather, rotten - by the odd character design. Slurpy tentacle boy Fin and half-a-kid-on-a-skateboard Half Pipe are grim enough to disguise the fact that they boil down into Mr. Can Climb Walls and Mr. Fits In Small Gaps, respectively.