diff --git a/build.sh b/build.sh
deleted file mode 100755
index 70e0f55..0000000
--- a/build.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-
-set -e
-
-for dir in forest; do
-	echo "-- $dir --"
-	cd $dir
-	./build.sh
-	cd ..
-done
-
-echo "-- done --"
diff --git a/projects/forest/main.c b/projects/forest/main.c
index c34f0f5..d610e6f 100644
--- a/projects/forest/main.c
+++ b/projects/forest/main.c
@@ -89,10 +89,10 @@ void init() {
 
 
 void draw() {
-  double dt = worldGetFrameTime();
+  double dt = windowGetFrameTime();
   t += dt;
-  int w = worldGetWidth();
-  int h = worldGetHeight();
+  int w = windowGetWidth();
+  int h = windowGetHeight();
   double range = w;
   
   double gy = groundLevel(x);
@@ -122,11 +122,11 @@ void draw() {
 
 
 int main() {
-  worldSetVariableFrameRate();
-  worldSetResizable(TRUE);
-  worldSetInit(&init);
-  worldSetDraw(&draw);
-  worldRun();
+  windowSetVariableFrameRate();
+  windowSetResizable(TRUE);
+  windowSetInit(&init);
+  windowSetDraw(&draw);
+  windowRun();
   return 0;
 }
 
diff --git a/projects/forest/tree.c b/projects/forest/tree.c
index 2a4c2f1..1a4e6e9 100644
--- a/projects/forest/tree.c
+++ b/projects/forest/tree.c
@@ -100,10 +100,10 @@ void treeDraw(const Tree *t, double time, int flags) {
   saveState();
   translate(t->x, t->y);
   
-  fill(colorByName("green"));
-  stroke(colorByName("black"));
+  fill(colorByRGBA(0, 0.5, 0, 0.5));
+  stroke(COLOR_BLACK);
   srand(t->seed);
-  branch(0, 0, t->angle, t->width, time, int flags);
+  branch(0, 0, t->angle, t->width, time, flags);
   
   restoreState();
 }