Quite an original and clever premise! Funny writing, especially the intro sequence. I love the idea of Reddit Guy actually being useful to someone.
Vibrant art style with a lot of personality. (Hey look, I used gelatinous cubes in my game too! :D )
A few suggestions for improvement:
-The card play could be slightly faster.
-The opponents could have names and unique taglines.
-Setting aside each enemy's vulnerabilities, it is a little unclear whether they are immune to the other suits or simply less vulnerable.
-A little indicator should show the amount of damage that each attack does (of course I can figure it out by comparing and subtracting, but we're conditioned to expect this feature).