diff --git a/boot/rocket.ks b/boot/rocket.ks
index 8a5fb47..1a1b969 100644
--- a/boot/rocket.ks
+++ b/boot/rocket.ks
@@ -1,5 +1,11 @@
-COPYPATH("0:/noop", "").
-COMPILE "0:/launch" to "1:/launch".
-COMPILE "0:/lib/guidance" to "1:/lib/guidance".
+// rocketOS bootstrapping sequence
 
-SET core:bootfilename to "noop".
+// Install software.
+compile "0:/os/rocketos" to "1:/boot/rocketos".
+compile "0:/lib/guidance" to "1:/lib/guidance".
+compile "0:/launch" to "1:/launch".
+
+// Set OS to boot and restart.
+set core:bootfilename to "boot/rocketos".
+
+reboot.
diff --git a/launch.ks b/launch.ks
index 67d7d70..e912f82 100644
--- a/launch.ks
+++ b/launch.ks
@@ -4,6 +4,11 @@ local APOAPSIS_TARGET is 80000.
 local GRAVITY_TURN_START is 5000.
 SensorCheck().
 
+// Configure subsystems.
+CORE:PART:GETMODULE("kOSProcessor"):DOEVENT("Open Terminal").
+RCS off.
+SAS off.
+
 // Countdowns are cute.
 print "Initiating automated launch sequence".
 from { local x is 5. } until x = 0 step { set x to x - 1. } do {
@@ -12,10 +17,6 @@ from { local x is 5. } until x = 0 step { set x to x - 1. } do {
 }
 print "Launching".
 
-// Disable subsystems.
-RCS off.
-SAS off.
-
 // throttle controls
 when TWR() > 1.5 then {
   if SHIP:ALTITUDE > 32000 {
@@ -23,9 +24,7 @@ when TWR() > 1.5 then {
     return false.
   }
 
-  local newThrot is ThrottleToTWR(1.5).
-  print "Setting throttle to " + newThrot.
-  lock THROTTLE to newThrot.
+  lock THROTTLE to ThrottleToTWR(1.5).
   return true.
 }
 
@@ -39,11 +38,18 @@ lock STEERING to heading(90, 85, -90).
 
 wait until SHIP:ALTITUDE > GRAVITY_TURN_START.
 print "Beginning gravity turn".
-until SHIP:APOAPSIS > 80000 {
-  local angle is max(30, SHIP:PROGRADE:PITCH - 2).
+until SHIP:ORBIT:APOAPSIS > 80000 {
+  local adjustedPrograde is SHIP:ORBIT:PROGRADE * NORTH.
+  local angle is max(30, adjustedPrograde:pitch).
+  print "Adjusted Prograde = " + adjustedPrograde.
+  print "Angle = " + angle.
   lock STEERING to heading(90, angle, -90).
   wait 0.001.
 }
 
 print "Releasing controls. Good luck, Kerman!".
 set THROTTLE to 0.0.
+unlock THROTTLE.
+unlock STEERING.
+wait 5.
+CORE:PART:GETMODULE("kOSProcessor"):DOEVENT("Close Terminal").
diff --git a/os/rocketos.ks b/os/rocketos.ks
new file mode 100644
index 0000000..9b6f667
--- /dev/null
+++ b/os/rocketos.ks
@@ -0,0 +1,13 @@
+function launchButtonPressed {
+  run "launch".
+}
+
+// Button panel
+local interface is gui(200).
+
+// Launch button
+local launchButton is interface:addbutton("Launch").
+set launchButton:onClick to launchButtonPressed@.
+interface:show().
+
+wait until false.