diff --git a/CREDITS.md b/CREDITS.md
index 3af6fbb..399d9b6 100644
--- a/CREDITS.md
+++ b/CREDITS.md
@@ -1,41 +1,46 @@
-Lazarr!
-A laser puzzle game by Wuzzy.
+CREDITS for Lazarr!
 
-Send lasers to the detector to get to the next level. There are 10 levels.
-
----------------
+Lazarr! is a puzzle game by Wuzzy, using some textures, sounds and code from others.
 
 External mods used:
 
-* `show_wielded_items`
+* `show_wielded_item`
 * `no_fall_damage`
-* `player_api`, `stairs`, `xpanes`,
-* `xdecor` (heavily modified)
-
-Here’s the stuff not done by Wuzzy:
+* `player_api`, `xpanes`, `stairs`, `screwdriver`
+* `xdecor` (heavily modified, non-free textures removed)
 
 ---
 
 Textures:
-- Water, tool, hand, player textures come from “PixelBOX” texture pack by jp (WTFPL)
-- Other textures come from “MTUOTP” texture pack by GamingAssociation39 (CC BY-SA 4.0)
-- Textures in xdecor mod made by jp (WTFPL)
+- Water, wood, tree, stone, tools, hand, player textures come from “PixelBOX” texture pack by jp (CC0)
+- Textures in xdecor mod made by jp (CC0)
+- Crosshair, wieldhand, `smoke_puff.png`: trivial textures by Wuzzy (CC0)
 
 Models:
-- Player models comes from Minetest Game (see license of Minetest Game for details)
+- Player models comes from Minetest Game (see license of Minetest Game 5.4.1 for details)
 
 Sounds:
-- All sounds come from Minetest Game (see license of Minetest Game for details)
-- Exception: Ocean waves come from https://freesound.org/people/inchadney/sounds/135805/
-	done by inchadney (CC BY 3.0)
+- All sounds come from Minetest Game (see license of Minetest Game 5.4.1 for details)
+- Exception 1: Ocean waves come from https://freesound.org/people/inchadney/sounds/135805/
+	- by inchadney (CC BY 3.0)
+- Excecption 2: Screwdriver sounds
+	- Created by InspectorJ <www.jshaw.co.uk> of Freesound.org (CC BY 3.0):
+		- `screwdriver_use.1.ogg`
+		- `screwdriver_use.2.ogg`
+		- `screwdriver_use.3.ogg`
+		- `screwdriver_use.4.ogg`
+		- (Original file name: Screwdriver, Ratchet, C.wav)
 
 Code:
-- `player_api`, `stairs`, `xpanes` come from Minetest Game, by Minetest Game developers (see README.txt in that folder)
+- `player_api`, `stairs`, `xpanes`, `screwdriver` come from Minetest Game 5.4.1 (mods modified for Lazarr!), by Minetest Game developers (see README.txt in those folders)
+- `xdecor` by jp (BSD-3 clause license; massively-simplified version from the original)
 
 Other stuff:
 - See the licence files of the individual mods
 
-Code for all the mods that begin with "lzr_"
+Code for all the mods that begin with "lzr_" (e.g. the mod "`lzr_laser`")
 - done by Wuzzy (GPLv3+)
 
-Everything else done by Wuzzy is CC0!!!
+`no_fall_damage`, `no_multiplayer`, `show_wielded_item` mods
+- done by Wuzzy (CC0)
+
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..c5ada6c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,7 @@
+Lazarr!
+A laser puzzle game by Wuzzy. Hastily made for the Minetest Game Jam 2021.
+
+Send lasers to the detector to get to the next level. There are 10 levels.
+
+
+See CREDITS.md for credits and license.