I'm a sucker for Card games hahaha especially poker :D
I will say that it was still unclear what was going on most of the time, and the upgrades seemed pretty simple at the moment. Granted that is by far the hardest thing to get right in a 4 day game jam so, much love to you for the effort! haha it is one hell of a challenge to say the least.
I think having a bit more vfx and animations could really make something like this shine! and also throwing some wrenches in the mix could make it really enjoyable, so it adds some more complexity for strategy!