This was actually really fun! I enjoyed the panic of having to scour the chart for the combinations! Also your music choice and graphics were superb. Really created a fun dirty casino vibe.
Some minor suggestions: I think maybe adding a memory factor where you have to remember the opponent's previous emotions would also make for really interesting gameplay. Then you'd actually be unsure at times if your memory is correct, thereby only betting half or even a forth. Also your transition between the start menu and the game itself was a bit clunky on my playthrough.
Overall, really good job! I think this is definitely a top tier game and worth the time to develop further into a full scale game.