I'm still having problems packing my resources, after going through complicated APIs and basically just zip files which are exhausting my brain, I thought I could also pack the game with the resources visible to the human eye, in a simple folder.

Would that be unprofessional? Personally, I've never even seen games do that, it would basically mean that the player could just edit whatever he wants in the game, like go in map1.txt and add an X somewhere to create a wall, or change the player sprite to a pony in MS PAINT.