I love your other card games and have been playing them nonstop for days each. If you're still developing them, I have a chunk of suggestions for them.
I just got off a Mind Cards binge when I saw this come up on your profile! But for whatever reason, this doesn't grab me the same way your other games did.
Perhaps it could be the lack of persistent progression? This game can end rather uneventfully and lead you back all the way to the beginning with nothing to show for it. While your other games can commonly end with scenarios where defeat is guaranteed, here it tends to be more demoralizing since the number of options we have are extremely limited. We get a random set of starter cards and get one card out of a random set of four, and aside from that we don't have any input about how things go. It's hard to strategize.
The type of play is also quite limited since it's basically colors as the only mechanic. Not a lot of differences in kind to keep things interesting.