Wow. I don't know how you replicated the look so perfectly, but it does look exactly like Balatro. The new game rules are also clever. My only note is that when the game came up, it was jarring to not hear the Balatro soundtrack start playing. lol. Amazing work - congrats on the submission.
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Glad you liked it! I started with a YouTube tutorial to learn what makes Balatro special. To be honest, I couldn't replicate its most praised part, which is the 20 minute single soundtrack that plays throughout the whole game, mixed with pitching and seamlessly fading to different points in the song during different situations in the game.
My project focused on tweening, shaders, and visual fidelity, and in the end, I learned a lot! :D
Also, I can highly recommend godotshaders.com
I found the swirly paint shader there, along with the fake 3D card hover and CRT effect.