I made a goal of making a gbc homebrew as a motivator to start touching up on many things I haven't even thought of before (coding, art, music). I'm trying to grasp the game boy; how it works and its limitations. It's all very interesting, but I have some questions.
What can make some gbc games incompatable with gb besides color puzzles?
Are only tiles of the same size allowed on each tile map/layer?
Some games, such as Shantae, have objects (Shantae herself) that use 7 different colors and an unconventional tile size. How is this done?