Very nice game, I loved the poker-like aesthetic the game gives and the effort put in to give that aesthetic, and the music fit really well.
My main complaint is that some of the levels are too RNG-dependent, so you can easily get screwed over by bad luck, especially in Level 2 and 4, because at any point in the game there are cards that cannot kill any dice and so are just trash cards sitting in your hand until the rule switches, unlike Levels 1 and 3 where each card can kill off one colour.
One other suggestion is to give a bit of lead-up time to a rule-change, so you don't shoot the moment the rule changes and miss because of that. A short countdown timer, maybe 3 seconds, should do the trick.
Still, I enjoyed it. Great job!