Completed compile instructions and credits

CREDITS.md

@@ -7,3 +7,12 @@
 - Level 2 & 5 : Quincas Moreira - Robot City
 - Level 3 & 4 : Kubbi - Up In My Jam
 - Intro and ending : The Whole Other - 8-Bit Dreamscape
+
+## Sprites
+
+Sprites are mostly made by [Grafxkid](https://opengameart.org/users/grafxkid) and [Etqws3](https://opengameart.org/users/etqws3).
+All sprites are slightly edited, mainly to fit the [Na16 palette](https://lospec.com/palette-list/na16).
+
+## Sound effects
+
+All are generated using [JSFXR](https://sfxr.me)

README.md

@@ -1,3 +1,21 @@
 # Overflown
 
-A Platformer with water
+A Platformer centered around water and trash, made for the [Seajam](https://itch.io/jam/seajam).
+
+## How to compile it
+
+The game uses [python](https://www.python.org/) and [pygame](https://www.pygame.org/news).
+
+Here's how to compile it using [pyinstaller](https://www.pyinstaller.org/)
+
+### On Linux/Unix
+
+```bash
+pyinstaller --onefile --noconsole launcher.py --add-data "gamedata:gamedata"
+```
+
+### On Windows
+
+```bash
+pyinstaller --onefile --noconsole launcher.py --add-data "gamedata;gamedata"
+```