Quite a fun little concept! It's pretty frantic to have to read the emotion chart in time and still bet in such a short time-span, really keeps you on your toes. Gotta say, seeing that cash number flow out into an exponential is quite the sight.
I feel there's not that much strategy to the actual betting, but that could very well be me not grasping it fully. There's no reason not to go all in if you managed to read the other better's expression in time, and as long as you pick a dice before the time limit you can just... not bet any money. Also, the game looks wonky on display resolutions below 1080p - though that may be a web build limitation.
All in all though, great job!