I love this! A simple yet intriguing ruleset presented well with cute graphics. I bet it will be even cuter with little sound effects (300/0) ^ ^
I haven't played Balatro, but the rule is very well balanced. Clearing the rounds isn't hard, but it's quite an enjoyable experience for me. I think it will also make a nice endless game!
(If I were to get picky, maybe the scoring rule can be unfolded right at the beginning to make a clearer introduction.)