Awesome! Have fun :) I'd be happy to help if you get stuck on anything
Yh now that you mention it I guess I have done a fair amount in PICO-8. It's been my go-to platform since I started using it, it's just so fun and easy. And since there's only 16 colors and the sprites are so small (8x8) and resolution so low (128x128), it made the idea of doing pixel art a lot less daunting. I hadn't done any before I started using it, but I'm quite happy with the small sprites I can create now.
Thanks for checking out my stuff :) Most of my PICO-8 things are on itch.io or the PICO-8 forum. There's also this twitter thread where I've put all my tweetcarts (PICO-8 programs in 140 characters or less, see this *amazing* forum thread for lots more). I really dig the aesthetic of your game Reefy Madness btw, it's really nice.