diff --git a/internal/sim/log.go b/internal/sim/log.go
new file mode 100644
index 0000000..1922e6e
--- /dev/null
+++ b/internal/sim/log.go
@@ -0,0 +1,20 @@
+package sim
+
+import (
+	"os"
+
+	"github.com/jordanorelli/blammo"
+)
+
+func defaultLog() *blammo.Log {
+	stdout := blammo.NewLineWriter(os.Stdout)
+	stderr := blammo.NewLineWriter(os.Stderr)
+
+	options := []blammo.Option{
+		blammo.DebugWriter(stdout),
+		blammo.InfoWriter(stdout),
+		blammo.ErrorWriter(stderr),
+	}
+
+	return blammo.NewLog("sim", options...)
+}
diff --git a/internal/sim/player.go b/internal/sim/player.go
index b502f6d..ac056a0 100644
--- a/internal/sim/player.go
+++ b/internal/sim/player.go
@@ -6,7 +6,6 @@ import (
 	"github.com/jordanorelli/blammo"
 )
 
-// player is a player session in the simulation, eek
 type player struct {
 	*blammo.Log
 	*room
diff --git a/internal/sim/server.go b/internal/sim/server.go
index 5da565b..af1f66c 100644
--- a/internal/sim/server.go
+++ b/internal/sim/server.go
@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"net"
 	"net/http"
-	"os"
 	"strconv"
 	"sync"
 	"time"
@@ -19,7 +18,7 @@ import (
 type Server struct {
 	*blammo.Log
 	http  *http.Server
-	world *World
+	world *world
 
 	sync.Mutex
 	lastSessionID  int
@@ -29,20 +28,11 @@ type Server struct {
 
 func (s *Server) Start(host string, port int) error {
 	if s.Log == nil {
-		stdout := blammo.NewLineWriter(os.Stdout)
-		stderr := blammo.NewLineWriter(os.Stderr)
-
-		options := []blammo.Option{
-			blammo.DebugWriter(stdout),
-			blammo.InfoWriter(stdout),
-			blammo.ErrorWriter(stderr),
-		}
-
-		s.Log = blammo.NewLog("astro", options...).Child("server")
+		s.Log = defaultLog().Child("server")
 	}
 
-	s.world = NewWorld(s.Log.Child("world"))
-	go s.world.Run(3)
+	s.world = newWorld(s.Log.Child("world"))
+	go s.world.run(3)
 
 	addr := fmt.Sprintf("%s:%d", host, port)
 	lis, err := net.Listen("tcp", addr)
@@ -131,7 +121,7 @@ func (s *Server) Shutdown() {
 	go func() {
 		defer wg.Done()
 
-		if err := s.world.Stop(); err != nil {
+		if err := s.world.stop(); err != nil {
 			s.Error("error stopping the simulation: %v", err)
 		}
 	}()
diff --git a/internal/sim/session.go b/internal/sim/session.go
index cb840d6..0d8f941 100644
--- a/internal/sim/session.go
+++ b/internal/sim/session.go
@@ -84,7 +84,7 @@ func (sn *session) read(c chan Request) {
 			var req wire.Request
 			if err := json.Unmarshal(b, &req); err != nil {
 				sn.Error("unable to parse request: %v", err)
-				sn.outbox <- wire.ErrorResponse(req.Seq, "unable to parse request: %v", err)
+				sn.enqueue(wire.ErrorResponse(req.Seq, "unable to parse request: %v", err))
 				break
 			}
 			sn.Info("received message of type %T", req.Body)
@@ -107,10 +107,10 @@ func (sn *session) read(c chan Request) {
 					Wants: v,
 				}
 			default:
-				sn.outbox <- wire.ErrorResponse(req.Seq, "not sure how to handle that")
+				sn.enqueue(wire.ErrorResponse(req.Seq, "not sure how to handle that"))
 			}
 		case websocket.BinaryMessage:
-			sn.outbox <- wire.ErrorResponse(0, "unable to parse binary frames")
+			sn.enqueue(wire.ErrorResponse(0, "unable to parse binary frames"))
 		}
 	}
 }
@@ -139,3 +139,16 @@ func (sn *session) sendResponse(res wire.Response) error {
 	sn.Child("sent-frame").Info(string(payload))
 	return nil
 }
+
+func (sn *session) enqueue(res wire.Response) {
+	select {
+	case sn.outbox <- res:
+		return
+	default:
+		select {
+		case <-sn.outbox:
+			sn.enqueue(res)
+		default:
+		}
+	}
+}
diff --git a/internal/sim/world.go b/internal/sim/world.go
index 9ca5c47..2324c5d 100644
--- a/internal/sim/world.go
+++ b/internal/sim/world.go
@@ -8,8 +8,8 @@ import (
 	"github.com/jordanorelli/blammo"
 )
 
-// World is the entire simulated world. A world consists of many rooms.
-type World struct {
+// world is the entire simulated world. A world consists of many rooms.
+type world struct {
 	*blammo.Log
 	Inbox chan Request
 
@@ -19,7 +19,7 @@ type World struct {
 	players      map[string]*player
 }
 
-func NewWorld(log *blammo.Log) *World {
+func newWorld(log *blammo.Log) *world {
 	bounds := math.CreateRect(10, 10)
 	foyer := room{
 		Log:     log.Child("foyer"),
@@ -35,7 +35,7 @@ func NewWorld(log *blammo.Log) *World {
 		behavior: doNothing{},
 	}
 	log.Info("created foyer with bounds: %#v having width: %d height: %d area: %d", foyer.Rect, foyer.Width, foyer.Height, foyer.Area())
-	return &World{
+	return &world{
 		Log:     log,
 		rooms:   []room{foyer},
 		done:    make(chan bool),
@@ -44,7 +44,7 @@ func NewWorld(log *blammo.Log) *World {
 	}
 }
 
-func (w *World) Run(hz int) {
+func (w *world) run(hz int) {
 	defer w.Info("simulation has exited run loop")
 
 	period := time.Second / time.Duration(hz)
@@ -94,13 +94,14 @@ func (w *World) Run(hz int) {
 	}
 }
 
-func (w *World) Stop() error {
+func (w *world) stop() error {
 	w.Info("stopping simulation")
 	w.done <- true
+	w.Info("simulation stopped")
 	return nil
 }
 
-func (w *World) tick(d time.Duration) {
+func (w *world) tick(d time.Duration) {
 	for _, r := range w.rooms {
 		r.update(d)
 	}