Originally the idea was to have a game that was playable by being cheap, simple, and cheat proof. You have your deck of cards minus the jokers. I had the members in this game each draw 20 cards and write them down. I have 2 deck, so one was the "players" and one was the "enemies". I drew the top card to see which side went first. Here is where the "cheat proof" part comes in. Normally, the higher card wins, but that just won't work, because everyone could say they had a King. In this case I chose a number that someone had to be close enough to for a hit and drew the "enemy" card to see the difference. The cards wrap around so that a "3" is only 5 away from a Jack for example. A,2,3,4,5,6,7,8,9,10,J,Q,K,A,2,3,4,5,6,7...... hope that helps explain that. So for example when Gevallen hit the Rhino Beetle, the result was something like I needed to be within 3 and Gevallen's card was a 10 of Hearts. The enemies card was a 10 of Clubs. So not only did he hit, but he had the exact same amount. I then drew a card to see what the damage was and doubled it because it was the same value. Using dice, this would be a critical hit. It was enough to kill the Rhino Beetle. With Alatrix's decapitation on the Rhino Beetle, the card was an exact match, an Ace of Spades. So I just made it an instant kill. For each round, I kept the attack order the same, but used 2 drawn cards to determine the range you needed for it to be a hit. Once there was a hit, I drew a card to see how much damage and kept track on a piece of paper.
In this adventure, Gevallen killed his opponent on the first hit. Gareth hit Rhino Beetle 2 for 6 damage. Reijin and Alatrix missed on the first try. Rhino Beetle missed Gareth and Rhino Beetle 3 hit Rejin for 4 damage. Round 2 saw Gevallen miss, Gareth hit for enough damage to barely kill Rhino Beetle 2 and Reijin and Alatrix miss again. Rhino Beetle 3 missed again. Round 3 was when Alatrix had the instant kill.
I simplified if even more so I could have results for this adventure. I do have the beginnings of a game using cards that involve more detail and stuff. It involves using the 4 suits (Hearts, Spades, Diamonds, Clubs) as abilities (Strength, Intelligence, Dexterity, Luck). and also similar saving throws (Reflex, Will Fortitude, Other). I hope that explains the most part of it.
"I might be a few bricks short of a wall, but they are Lego bricks. Watch where you step, because they hurt like a #*%$#"