This was a neat idea that adds a fun new way to look at Poker. It was very tense when I went all-in on a hand and had to hope I didn't miss something and create a straight for an opponent without realizing it.
In my first attempt I went all-in on a flush looking to tie with another player, but I forgot about how the held card breaks the tie. So your hand-evaluation system seems to handle the edge-cases, but it did mean I let Jimmy get killed one time.
If you added the ability for opponents to fold, it would create a fun extra layer since you would have to make your opponents' hands look really good while still making Jimmy's hand win.
Nice work!