fix

room.go

@@ -6,14 +6,14 @@ import (
 )
 
 type Room struct {
-	Players map[string]*Player
+	Players map[int64]*Player
 	Input   chan InputMessage
 	mu      sync.Mutex
 }
 
 func NewRoom() *Room {
 	return &Room{
-		Players: make(map[string]*Player),
+		Players: make(map[int64]*Player),
 		Input:   make(chan InputMessage, 128),
 	}
 }
@@ -48,7 +48,7 @@ DONE:
 func (r *Room) broadcast() {
 	r.mu.Lock()
 
-	state := make(map[string]map[string]any, len(r.Players))
+	state := make(map[int64]map[string]any, len(r.Players))
 	for id, p := range r.Players {
 		state[id] = map[string]any{
 			"x":    p.X,