Fun- the game is almost as fun as its full-scale counterpart
Difficulty level on par with classic arcade games
Supports 1-2 players
All the special infected are clearly recognizable
Cons
No difficulty selector
No game saving- you have to start the entire game over after exiting
Limited weapon selection
Ammo pickup system needs some small tweaks
Very easy to be swarmed
Bosses could be balances a bit more
Summary
If you are expecting an 8 bit fps, you're deluding yourself. Assuming that this game would have the same amount of polish as its full on counterpart from which this game derives its inspiration is absurd. This game is, however, a pretty spot on top down arcade interpretation of the original. It is VERY difficult, harkening itself to classic games of old. Overall, it's a very fun iteration of L4D that you should at least try.