- Have you run 'gulp'? You need to run 'gulp' after performing any change to development files, otherwise the changes aren't reflected to the build files. I added a line to the slides to make this clear.
- That's weird. Can you confirm that inside the resources folder you have all your icons with the right sizes? You can compare them with the original Moodle Mobile icons.
- As it's said in the slides, you need to add your custom CSS to scss/app.scss (and run 'gulp' to be compiled).