Hi! Thank you so much, I'm really glad you're enjoying the assets! 😊
The sprites are provided with transparent backgrounds and organized by category, designed to be flexible across multiple resolutions — including 32×32! So you can absolutely use them in a 32×32 project.
If you're having trouble with the slicing in Unity, I'd recommend importing them individually by category and adjusting the slice settings manually to fit each element's actual size.
If you run into any issues, feel free to reach out to me directly through the email on my profile — happy to help! 🎮