JS topics
- connecting files in JS and how that works (imports / exports)
- package.json
- classes & inheritance in JS
Game dev topic
- collision and how that works in excalibur / game dev
And look at this stuff in Jelly Jumper (https://github.com/excaliburjs/sample-jelly-jumper)
resources:
- import / export / using files together: https://javascript.info/import-export
- JS classes / inheritance: https://javascript.info/class-inheritance