That is really good input, thank you all.
- I basically am looking at it as a hearthstone-type encounter. You would be paired up with a stranger (or a friend) and play a game, after which point it's over. However prompting 'would you like to play another match?' would probably work great ... so that people can have a rematch if they both choose to.
- The reason I'm thinking to work within time bounds is so that the game is manageable as a quick game before sleep or before work, or on a break. There might be some in-between activity in game, sort of like hearthstone has of crafting cards and making decks - truthfully the game is very much inspired by hearthstone (without cards though).
- Aiming for casual, not hard core play, but i'd like to have features which would give hardcore players advantage.