I get the Another World comparison a lot, and consider it a big compliment, but of course the Dig is also one of my favorites (and one of the unsung classics), so thanks!
Honestly I've tried before and while I was a lot less talented at the artwork the hardest part to making an adventure game is all the writing you need to do, and I'm honestly not much of a writer.
Ok well that and sound/music. That takes an entirely different skillset and equipment I just don't have access to.