I started from scratch with a new repository and rewrote the prototype using GLES2 because I wanted to see what the differences are and if they impact this type of game.
I added a better jump puzzle and win/lose conditions. Right now the game just pauses because making anything GUI-related (including title screens) is a huge pain.
Now that I have the basics down, I need to create my own tileset. I'm calling this game "Mallard Tails" so I'm going to re-create Scrooge McDuck as a Mallard!