Newsletter 10: Add sandbox (#146)

* Add sandbox

* Newsletter 10: sandbox: fmt tweaks & video preview

Co-authored-by: Andrey Lesnikov <ozkriff@gmail.com>

Author: JMS55

content/posts/newsletter-010/index.md

@@ -158,6 +158,41 @@ with highlights also published on [YouTube][sailing-youtube].
 [sailing-twitch]: https://twitch.tv/kunosstefano
 [sailing-youtube]: https://youtube.com/channel/UC7n_g2xDySrmKRaf41rSwlg
 
+### [Sandbox]
+
+[![Sandbox gameplay demo](sandbox.jpeg)](https://streamable.com/0bhbol#)
+
+^ _click to see a gameplay demo_
+
+[Sandbox] is a falling sand game by JMS55 that provides a variety of fun
+particle types to place, and then you get to watch the resulting interactions!
+
+The main focus so far has been experimenting with different particle types, including:
+
+- Sand
+- Acid - Dissolves material.
+- Water
+- Replicator - Creates infinite copies of other particles.
+- Plant - Grows over time once placed on wet Sand, or on top of an existing
+  plant.
+- Cyrotheum - A cold particle that melts over time, and releases a wave of
+  cold to its surroundings.
+- Unstable - Heats up over time, vaporizing a large radius at too high
+  of a tempature, and releases Smoke.
+- Electricity - Can only exist when falling, or in Water.
+  Flows through Water. Very hot.
+- Glass - Created by heating up Sand. Acts like a liquid at
+  high enough tempatures, and a solid otherwise. Immune to Acid.
+- Life - A semi-intelligent particle that stacks itself up, and moves
+  as a group. Likes to breed upon eating Plants. Will jump down short drops.
+  Dies if too hot or cold, or upon falling a large distance.
+- Blood - Created by pressurizing dead Life particles, by stacking
+  enough of other particles on top.
+
+Got any ideas? Leave an [issue on github][Sandbox], or add it yourself!
+
+[Sandbox]: https://github.com/JMS55/sandbox
+
 ### For The Quest
 
 ![For The Quest screenshot](forthequest.jpg)