This game is a brilliant example of a good implementation of a simple idea. The game itself is actually not that fun, but the setting, the zombies and their conversations, ... all the small details. It is easy to ruin a good game concept completely by poor setting. You managed to improve a rather simplistic concept and actually make it fun. I can't really nail it down, what makes this fun, but it is.
You are right, that was kind of experiment, check out our game "Soldiers" http://www.kongregate.com/games/BubbleBox/soldiers?acomplete=soldier level 5, the use of a frag grenade, we took just a small part of the gameplay and created a playable game from it, using setting and details, just for an experiment, so you can see the result now)
Absolutely wonderful game. Superb graphics and nice tune. Game itself is "only" a puzzle game, but the setting makes it so much more. Two things though... it is very easy to get stuck on doors! And when playing with mouse, you would expect the character to find a path himself, not walk straight into a wall.
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You are right, that was kind of experiment, check out our game "Soldiers" http://www.kongregate.com/games/BubbleBox/soldiers?acomplete=soldier level 5, the use of a frag grenade, we took just a small part of the gameplay and created a playable game from it, using setting and details, just for an experiment, so you can see the result now)