Well made indie game but, you should definitely give credit to the original developers of the idea, Squaresoft.
They made a game called E.V.O. for the Super Nintendo, and this is almost an exact copy of it.
90% of the undead were slow moving and lethargic, where as the remaining 10% sprinted, and proved to be more of a threat. You've got the living dead etymology down to the core, my friend. Incredibly addictive, just the right amount of difficulty, and leaves you with a thirst for more. Very, VERY well done.
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