This need new update with custom pieces
yes you can edit or create new images inside the app , there will be different pixel editors , one for characters and it's animations , another for tilesets and their animations , another one for UI elements and one to create bitmap fonts and each one will focus on it's own job like aseprite and pyxel edit , for the first release i will focus on the character creator and the pixel art editor because they need lot's of work specially on how it should work to create new characters with bigger size like 32x32 and create it's hair and other extras with materials that can be changed for the whole character like the first version , it's a hard job and i don't want to make spaghetti code to be able to update it or fix bugs easily and also a standard extension for saved files that can be shared or moved across the next versions. for example each character will be saved in one file [ character_1.char ] alongside it's layers[character parts] and materials which can be shared later with other users and will allow me to share new characters publicly as files that reads only inside the app.