Hey,
The GBA/PS1 vibe looks cool.
I'm a freelance Unity dev. I usually help solo devs when they hit technical walls or need to get a feature built fast. If you run into something that's blocking you or just need extra hands for a bit, I can help out.
My rate is 20-30€/hour depending on what needs doing. I can give you a quote within a day if you have something specific in mind. Everything I deliver is tested, documented and ready to use.
You can see my work here: https://github.com/DoriannX/God-game-Q1 and https://h0xxe.itch.io/
If you need help now or down the line, feel free to reach out at theodor.xav@gmail.com
Good luck with the project.
Doriann Xavier