I thought it was lttp too before I really started looking. There's no beach in lttp, there's no kakariko village in the picture, there's no hyrule castle in the pic, death mountain doesn't extend all the way to the left in lttp, etc.
Hell yeah I can guess, I only played like hundreds of hours of Link's Awakening, my first Zelda game.
There's some sick official artwork for it too - makes me wish I could've seen Koholint Island as a current gen game instead of a GBC game. Still a great game though. I kinda want to dump some LoZ:LA art here, since Katsuya Terada's stuff is just insanely cool to look at. So uh, here's a few
Don't challenge people on the internet, now I have to get upset and go to great lengths to prove you wrong by charging my gameboy and playing Ruby until I find what I'm talking about and documenting it thoroughly.