LICENSE: clarify

LICENSE.md

@@ -3,10 +3,11 @@
 - Source code: GPL Version 3.0
     - https://codeberg.org/outfly/outfly
 - 3D models: By Yuni, CC0 License
+- 2D sprites: By Yuni, CC0 License
 - Photographs of celestial bodies:
     - Mercury: [By Solar System Scope, CC BY 4.0](https://www.solarsystemscope.com/textures/)
     - Venus: [By NASA, public domain](https://space.jpl.nasa.gov/tmaps/venus.html)
-    - Earth: A simple addition of
+    - Earth: By Yuni, CC0 License. A simple addition of
         - [base image, by NASA, public domain](https://visibleearth.nasa.gov/images/74318/april-blue-marble-next-generation-w-topography)
         - [clouds, by NASA, public domain](https://visibleearth.nasa.gov/images/57747/blue-marble-clouds)
     - Mars: [By Solar System Scope, CC BY 4.0](https://www.solarsystemscope.com/textures/)
@@ -44,7 +45,7 @@
         - Processed by cutting out min 1:47-3:47 and applying a 10s linear crossfade at the end. Exported as ogg with quality=3, see [.kdenlive file](src/audio/JupiterRecording.kdenlive).
         - The source file has been taken down, and generally, I can't find information on how exactly this was produced. Hoping it's not a hoax.
 - Star chart based on the [HYG Stellar database](https://github.com/astronexus/HYG-Database)
-- Font Yupiter-Regular.ttf is placed under the SIL OPEN FONT LICENSE Version 1.1 and is based on:
+- Font Yupiter-Regular.ttf: By Yuni, SIL OPEN FONT LICENSE Version 1.1. Combines glyphs from:
     - Noto Sans Symbols 2, Copyright 2022 The Noto Project Authors (https://github.com/notofonts/symbols)
     - ZCOOL QingKe HuangYou, Copyright 2018 The ZCOOL QingKe HuangYou Project Authors (https://www.github.com/googlefonts/zcool-qingke-huangyou)
     - Noto Sans SC, Copyright 2014-2021 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'.