diff --git a/crash.patch b/crash.patch
deleted file mode 100644
index 876b61d..0000000
--- a/crash.patch
+++ /dev/null
@@ -1,44 +0,0 @@
-diff --git a/src/tiles.rs b/src/tiles.rs
-index 4b6288e..5e62b95 100644
---- a/src/tiles.rs
-+++ b/src/tiles.rs
-@@ -52,6 +52,7 @@ impl Bg {
-                 h: 0,
-             },
-             layer: (),
-+            blend_graphic: String::new(),
-         }
-     }
- }
-@@ -76,6 +77,7 @@ impl Mid {
-                     h: 32,
-                 }),
-             },
-+            blend_graphic: String::new(),
-         }
-     }
- }
-@@ -92,6 +94,7 @@ impl Fg {
-                 h: 0,
-             },
-             layer: (),
-+            blend_graphic: String::new(),
-         }
-     }
- }
-@@ -145,6 +148,7 @@ where
-     pub graphic_name: String,
-     pub tex_rect: IntRect,
-     pub layer: Layer::SpecificDef,
-+    pub blend_graphic: String,
- }
- 
- #[derive(Debug, Inspect, Default, Serialize, Deserialize)]
-@@ -179,6 +183,7 @@ where
-             graphic_name: Default::default(),
-             tex_rect: Default::default(),
-             layer: Layer::SpecificDef::default(),
-+            blend_graphic: String::new(),
-         }
-     }
- }
diff --git a/design/data.md b/design/data.md
deleted file mode 100644
index 8cc7246..0000000
--- a/design/data.md
+++ /dev/null
@@ -1,11 +0,0 @@
-Tile
-
-9 bits bg       
-9 bits mid      
-9 bits fg        32 bits
-3 bits slope    
-2 bits fg state  (0: fg has ore, 1: bg has ore, 2: both have ores)
-
-5 bits liquid type 
-6 bits paint        16 bits
-5 bits reserved    
\ No newline at end of file
diff --git a/design/design.md b/design/design.md
deleted file mode 100644
index 03469d6..0000000
--- a/design/design.md
+++ /dev/null
@@ -1,82 +0,0 @@
-# Premise
-
-- Evil source at bottom of playable map
-- Evil is surging upwards
-- Player is the one tasked with going to the bottom and destroying evil source
-- Very long way to bottom
-- Going deeper = main source progression
-- Barriers to going deeper, gotta craft gear, etc. to be able to go deeper
-- Tower defense elements, have to craft and set up defensive structures
-
-# Details
-
-## Timing
-Timing is tick based.
-Every frame is considered a tick.
-The game is locked at 60 fps to simplify implementation.
-
-## Scale
-Player character is slightly below 1.5 m height.
-1 meter = 2 blocks.
-1 block = 0.5 meters.
-Player character is about 3 blocks high. (slightly less so they fit comfortably)
-
-## Map Size
-
-World is roughly 100,000x100,000 blocks large.
-I've done some measurements and I believe it's large enough that it should convey
-the scale of digging very deep, which is what the game is about.
-Layer below 30 km is the mantle (after which the game is named).
-The evil source is at about 35 km.
-The final goal is the evil source, so player is expected to mine about 35 km deep to beat the game.
-1 meter = two tiles. 35 km = 70,000 tiles deep.
-There could be some post-endgame content from 35-40 kms deep.
-Very unbreakable bottom or lava lake or whatever is at 80,000 blocks (40 km) deep.
-
-## Biomes
-Only a few surface biomes
-- At center is forest biome
-- On one side:
-  - Jungle
-  - Desert
-- On other side:
-  - Longer stretch of forest biome than other side
-  - Ice biome
-
-All other biome variety should come from going deeper.
-Progressively more difficult variants of each biome as you go down.
-30 km is mantle level, at which point no ice or sand or such reaches.
-It's all mantle level specific biomes all the way horizontally.
-
-## Number of stuff
-
-- At least 50 ore types + 50 gem/etc. types. Copper/Coal could be an ore-gem/etc. pair for example.
-- On average, one new pair every 750 meters, up to 37 kilometers.
-  The last stretch of 3 km to the bottom is a "buffer zone" of no new content, just more of the same.
-- The rate of new pairs could start out quicker, for example every 300 meters or so,
-  to make early-game less boring, but gradually become less frequent, up to a kilometer gap.
-- At least 50 stone types
-- Maybe background tiles and other stuff, like different break overlay animations
-
-
-# Multiplayer
-
-Multiplayer adds a lot of complexity, so I'm going to develop the prototype of the game without
-any multiplayer support.
-But if people like the general idea, they can help create a multiplayer version eventually.
-
-# Crafting
-
-- You need a workstation to be able to craft anything.
-  This incentivizes building bases and retreating to them, instead of the "nomad"
-  lifetyle many games of this kind allow.
-
-- Most stations don't have inventory items that can be pre-crafted and placed.
-  Instead, they have to be constructed on the spot, taking construction time.
-  This discourages building makeshift crafting areas in the middle of nowhere.
-
-# Supported platforms
-- Windows
-- Linux
-
-Other platforms can be supported if community helps support them.
diff --git a/design/ideas.md b/design/ideas.md
deleted file mode 100644
index 7b12cca..0000000
--- a/design/ideas.md
+++ /dev/null
@@ -1,15 +0,0 @@
-Various random ideas that aren't (yet) part of the design
-
-- Character is 1.5 blocks tall
-- Can crawl to fit inside 1 block tall gaps
-
-
-- Multiple tile layers.
-    - Back layer
-    - Wall layer
-    - Ore/misc insert layer
-
-- No world hopping.
-  Characters are worlds are linked together, like in Minecraft.
-
-- No respawn after quit&save. Player character continues where it left off.
diff --git a/design/save.md b/design/save.md
deleted file mode 100644
index 9a74b6e..0000000
--- a/design/save.md
+++ /dev/null
@@ -1,13 +0,0 @@
-Game has different worlds you can generate.
-Each world has its own folder.
-Each folder has:
-    - Player file (player.dat)
-    - Subfolder for regions (regions/)
-
-Each region subfolder has:
-x.y.rgn files for each chunk, where x and y are the region coordinates.
-
-# Regions
-A region stores multiple chunks in a single file for more optimized storage.
-Current plan is to store 8 chunks in a region, in other words, 1024*1024 blocks.
-Around one million blocks, compressed with zstd compression.
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