Here is some art for you if you want to create an eerie ending. Eerie endings like this arouse questions and leave the players wanting more. Like maybe a part two? this creates a lasting "creeped" effect on the player, and will likely bounce around in their head for awhile. It leaves plenty of room to make a story people will be eager to know. I have supplied as well an altered cave sound that loops a bit better in my opinion. Only use if you want! Btw, if you want to make the ending creepier, stop all sounds when it comes up.
Please take this and use it in your game if you want. You can credit me if you want, but I won't ask for it. I did this because I loved your game! Credit to gorilla8080 for this amazing game.