diff --git a/projects/blades-engine/source/data/ScenData.hx b/projects/blades-engine/source/data/ScenData.hx
index b7a7c76f..987fc335 100644
--- a/projects/blades-engine/source/data/ScenData.hx
+++ b/projects/blades-engine/source/data/ScenData.hx
@@ -29,11 +29,9 @@ class ScenData {
 
         assert(floorData[95].name == "Floor", "floor is floor");
         assert(floorData[95].which_sheet == 704, "floor gets the right spritesheet");
-        trace(floorData[129]);
         assert(floorData[129].name == "Floor", "floors can import other floors' data");
         assert(floorData[129].which_sheet == 704, "floors can import other floors' data");
         assert(floorData[129].specialProperty() == BlockedToNPCs, "blocked special property becomes enum");
-        trace(terrainData[12].name);
         assert(terrainData[12].name == "Door", "door is door");
 
         trace('$passed assertions passed');
diff --git a/projects/blades-engine/source/data/TerrainData.hx b/projects/blades-engine/source/data/TerrainData.hx
index 05a643c7..5acbebe6 100644
--- a/projects/blades-engine/source/data/TerrainData.hx
+++ b/projects/blades-engine/source/data/TerrainData.hx
@@ -6,6 +6,7 @@ using Reflect;
 import data.FloorData;
 
 import flixel.input.keyboard.FlxKey;
+import kiss.Prelude;
 
 enum Direction {
     North;
@@ -58,6 +59,7 @@ enum TerrainSpecialProperty {
     QuickFlammable;
 }
 
+@:build(kiss.Kiss.build())
 class TerrainData {
     public function new() {}
     
diff --git a/projects/blades-engine/source/data/TerrainData.kiss b/projects/blades-engine/source/data/TerrainData.kiss
index 0e339662..0f39e016 100644
--- a/projects/blades-engine/source/data/TerrainData.kiss
+++ b/projects/blades-engine/source/data/TerrainData.kiss
@@ -42,4 +42,5 @@
         (42 ShimmerLightAndDark)
         (43 (Waterfall South))
         (44 (Waterfall East))
-        (45 QuickFlammable)))
\ No newline at end of file
+        (45 QuickFlammable)
+        (otherwise (throw "undefined special_property"))))
\ No newline at end of file