I’m not sure why it would be limiting. In your roulette example, I would use an index attribute for each game played because you will probably not have to remove or change the order of the game played.
{:game/result 3
:game/n 1}
{:game/result 7
:game/n 2}
...
If you need an identity for the numbers you can always have :game/result be a ref to a number entity.