NW19 flesh update (#504)

* NW19 flesh update

- Add gif file.
- Add update detail in Newsletter 19.

* fixed lint.

* added missing detail.

* Update content/posts/newsletter-019/index.md

Co-authored-by: Joe Clay <[email protected]>

Co-authored-by: Joe Clay <[email protected]>

Author: Im-Oab

content/posts/newsletter-019/flesh.gif

@@ -60,6 +60,21 @@ If needed, a section can be split into subsections with a "------" delimiter.
 
 ## Game Updates
 
+### Flesh
+
+![flesh preview](flesh.gif)
+_Title screen + gameplay_
+
+Flesh by [@im_oab] is a 2D-horizontal shmup game with hand-drawn animation and
+organic/fleshy theme. It is implemented using [tetra]. This month update include:
+
+- Add title screen.
+- Support gamepad.
+- Add new enemy types for first level include mid-boss.
+
+[@im_oab]: https://twitter.com/im_oab
+[tetra]: https://github.com/17cupsofcoffee/tetra
+
 ### [Teki (敵)][teki]
 
 ![teki preview](teki.gif)