Created a texture for the extra life item. It looks kind of weird. I tried to make it look like a stick figure with a plus sign, indicating an "extra life", but it turned out kind of odd.
Added lives, including an extra life item that sometimes appears in the dungeon shops. I even plan on going so far as to delete your save file if you run out of lives.
Given that most people are too stupid to compile from source. I'm considering selling my games while providing the full source code with assets included on Codeberg or any other repository host. It might be a sustainable business model.