Add flappy bird (#278)

* init author's work

* image updates

* text updates

* text updates

* Flappy Bird language edit

Co-authored-by: Tatenda <[email protected]>
Co-authored-by: worktheclock <[email protected]>

Author: 3 people

sidebar.json

@@ -436,6 +436,10 @@
         "name": "Creative Coding",
         "slug": "34-creative-coding"
       },
+      {
+        "name": "Flappy Bird with Kaboom.js",
+        "slug": "35-build-flappy-bird-with-kaboom"
+      },
       {
         "name": "Pinboard project part 1: HTML & CSS",
         "slug": "pinboard-project-part-1"