This was a cool concept, and I liked the Buckshot Roulette inspiration mixed with the spinning wheel theme. The randomness from the wheel made it feel tense and unpredictable, even if it could feel a little unfair at times. For an unfinished jam entry, the core idea is definitely interesting.
My main feedback is that I’d like to see more information and choices for the player. Knowing how many shots are left in the gun would help a lot, and adding more card options, events, or ways to affect the opponent could make the strategy much deeper. Overall, good start with a lot of potential if you keep developing it!