I'm looking for suggestions on easy or simple art styles that can be created by anyone. It would be for a 2D game, but pixel art isn't really my thing. An example from a game would help. Thank you very much.
Some games, such as roguelikes, feature graphics made up of nothing but colored ASCII characters. Dwarf fortress is a deep and complex game modeled after roguelikes. Here's what its graphics look like:
Making it look childish isn't a bad idea at hindsight. Look at An Untitled Story.