diff --git a/config/config.go b/config/config.go
index a6b49cd..78b4454 100644
--- a/config/config.go
+++ b/config/config.go
@@ -10,7 +10,7 @@ import (
 type Config struct {
 	ServerConfig    ServerConfig `toml:"SERVICE"`
 	BaseURL         string       `toml:"BASE_URL"`
-	SessionLifetime int          `toml:"SESSION_LIFETIME_SECONDS"`
+	SessionLifetime int64        `toml:"SESSION_LIFETIME_SECONDS"`
 	CookieSecret    string       `toml:"COOKIE_SECRET"`
 	LLMConfig       LLMConfig    `toml:"LLM"`
 }
diff --git a/handlers/auth.go b/handlers/auth.go
index 816a31f..3ad4eb9 100644
--- a/handlers/auth.go
+++ b/handlers/auth.go
@@ -183,17 +183,6 @@ func cacheSetSession(key string, session *models.Session) error {
 		return err
 	}
 	memcache.Set(key, sesb)
-	// TODO: to config
-	memcache.Expire(key, 60*60)
+	memcache.Expire(key, cfg.SessionLifetime)
 	return nil
 }
-
-// unused
-// func updateRoomInSession(ctx context.Context, roomID string) (context.Context, error) {
-// 	s, ok := ctx.Value(models.CtxSessionKey).(*models.Session)
-// 	if !ok {
-// 		return context.TODO(), errors.New("failed to extract session from ctx")
-// 	}
-// 	s.CurrentRoom = roomID
-// 	return context.WithValue(ctx, "session", s), nil
-// }
diff --git a/handlers/elements.go b/handlers/elements.go
index 50b1df1..279d9f9 100644
--- a/handlers/elements.go
+++ b/handlers/elements.go
@@ -167,8 +167,6 @@ func HandleAddBot(w http.ResponseWriter, r *http.Request) {
 		abortWithError(w, err.Error())
 		return
 	}
-	// TODO: what if bot exists already?
-	// control number and names of bots
 	botname := fmt.Sprintf("bot_%d", len(llmapi.SignalChanMap)+1) // what if many rooms?
 	bot, err := llmapi.NewBot(role, team, botname, fi.Room.ID, cfg)
 	if err != nil {
diff --git a/handlers/game.go b/handlers/game.go
index 1832f1a..5aa4f18 100644
--- a/handlers/game.go
+++ b/handlers/game.go
@@ -135,11 +135,14 @@ func HandleStartGame(w http.ResponseWriter, r *http.Request) {
 		abortWithError(w, err.Error())
 		return
 	}
-	// TODO: check if enough players; also button should be hidden if already running
+	// check if enough players
+	if err := fi.Room.CanStart(); err != nil {
+		abortWithError(w, err.Error())
+		return
+	}
 	fi.Room.IsRunning = true
 	fi.Room.IsOver = false
 	fi.Room.TeamTurn = "blue"
-	// fi.Room.LoadTestCards()
 	loadCards(fi.Room)
 	fi.Room.UpdateCounter()
 	fi.Room.TeamWon = ""
diff --git a/handlers/handlers.go b/handlers/handlers.go
index f776299..61dacd8 100644
--- a/handlers/handlers.go
+++ b/handlers/handlers.go
@@ -26,7 +26,6 @@ func init() {
 	memcache = cache.MemCache
 	cfg = config.LoadConfigOrDefault("")
 	Notifier = broker.Notifier
-	// go Notifier.Listen()
 }
 
 func HandlePing(w http.ResponseWriter, r *http.Request) {
@@ -84,6 +83,7 @@ func HandleExit(w http.ResponseWriter, r *http.Request) {
 	if len(exitedRoom.PlayerList) == 0 || creatorLeft {
 		removeRoom(exitedRoom.ID)
 		// TODO: notify users if creator left
+		// and throw them away
 		notify(models.NotifyRoomListUpdate, "")
 	}
 	if err := saveState(fi.State.Username, fi.State); err != nil {
diff --git a/handlers/middleware.go b/handlers/middleware.go
index d374c84..2c8eecd 100644
--- a/handlers/middleware.go
+++ b/handlers/middleware.go
@@ -26,9 +26,7 @@ func LogRequests(next http.Handler) http.Handler {
 
 func GetSession(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		// TODO: move
-		cookieName := "session_token"
-		sessionCookie, err := r.Cookie(cookieName)
+		sessionCookie, err := r.Cookie(models.AuthCookie)
 		if err != nil {
 			msg := "auth failed; failed to get session token from cookies"
 			log.Debug(msg, "error", err)
@@ -54,7 +52,7 @@ func GetSession(next http.Handler) http.Handler {
 		sessionToken := cookieValue[sha256.Size:]
 		//verify signature
 		mac := hmac.New(sha256.New, []byte(cfg.CookieSecret))
-		mac.Write([]byte(cookieName))
+		mac.Write([]byte(models.AuthCookie))
 		mac.Write([]byte(sessionToken))
 		expectedSignature := mac.Sum(nil)
 		if !hmac.Equal([]byte(signature), expectedSignature) {
diff --git a/llmapi/main.go b/llmapi/main.go
index 9860910..b777f9a 100644
--- a/llmapi/main.go
+++ b/llmapi/main.go
@@ -15,13 +15,6 @@ import (
 	"strings"
 )
 
-// TODO: config for url and token
-// completion prompt
-// MIME: llm needs to know all the cards, colors and previous actions
-// GUESSER: llm needs to know all the cards and previous actions
-
-// channels are not serializable
-
 var (
 	// botname -> channel
 	SignalChanMap = make(map[string]chan bool)
@@ -29,7 +22,6 @@ var (
 	// got prompt: control character (\\u0000-\\u001F) found while parsing a string at line 4 column 0
 	MimePrompt    = `we are playing alias;\nyou are a mime (player who gives a clue of one noun word and number of cards you expect them to open) of the %s team (people who would guess by your clue want open the %s cards);\nplease return your clue, number of cards to open and what words you mean them to find using that clue in json like:\n{\n\"clue\": \"one-word-noun\",\n\"number\": \"number-from-0-to-9\",\n\"words_I_mean_my_team_to_open\": [\"this\", \"that\", ...]\n}\nthe team who openes all their cards first wins.\nplease return json only.\nunopen Blue cards left: %d;\nunopen Red cards left: %d;\nhere is the game info in json:\n%s`
 	GuesserPrompt = `we are playing alias;\nyou are to guess words of the %s team (people who would guess by your clue want open the %s cards) by given clue and a number of meant guesses;\nplease return your guesses and words that you did not wish to open, but think that they could be also meant by the clue in json like:\n{\n\"guesses\": [\"word1\", \"word2\", ...],\n\"could_be\": [\"this\", \"that\", ...]\n}\nthe team who openes all their cards first wins.\nplease return json only.\nunopen Blue cards left: %d;\nunopen Red cards left: %d;\nhere is the game info in json:\n%s`
-	// notifier =
 )
 
 type DSResp struct {
@@ -245,6 +237,13 @@ func NewBot(role, team, name, roomID string, cfg *config.Config) (*Bot, error) {
 		Role: models.StrToUserRole(role),
 		Team: models.StrToUserTeam(team),
 	}
+	// check if already has the same team-role bot
+	// only one is allowed
+	for n, p := range room.BotMap {
+		if p.Role == bp.Role && p.Team == bp.Team {
+			return nil, fmt.Errorf("already has such bot with name: %s", n)
+		}
+	}
 	room.BotMap[name] = bp
 	switch team {
 	case "red":
@@ -385,11 +384,5 @@ func (b *Bot) CallLLM(prompt string) ([]byte, error) {
 		return nil, err
 	}
 	b.log.Debug("llm resp", "body", string(body))
-	// TODO: case where it has other text, not only json
-	// TODO: how to know which resp it is? mime or guessser?
-	// resp := &MimeResp{}
-	// if err := json.Unmarshal(body, &resp); err != nil {
-	// 	return nil, err
-	// }
 	return body, nil
 }
diff --git a/main.go b/main.go
index e4e4562..f414608 100644
--- a/main.go
+++ b/main.go
@@ -1,20 +1,27 @@
 package main
 
 import (
+	"fmt"
+	"golias/config"
 	"golias/handlers"
 	"log/slog"
 	"net/http"
 	"time"
 )
 
-// TODO: add config as param
+var cfg *config.Config
+
+func init() {
+	cfg = config.LoadConfigOrDefault("")
+}
+
 func ListenToRequests(port string) error {
 	mux := http.NewServeMux()
 	server := &http.Server{
 		Handler:      handlers.LogRequests(handlers.GetSession(mux)),
-		Addr:         port,
-		ReadTimeout:  time.Second * 5,
-		WriteTimeout: 0, // sse streaming
+		Addr:         fmt.Sprintf(":%s", port),
+		ReadTimeout:  time.Second * 5, // TODO: to cfg
+		WriteTimeout: 0,               // sse streaming
 	}
 	fs := http.FileServer(http.Dir("assets/"))
 	mux.Handle("GET /assets/", http.StripPrefix("/assets/", fs))
@@ -43,8 +50,7 @@ func ListenToRequests(port string) error {
 }
 
 func main() {
-	port := ":3000"
-	err := ListenToRequests(port)
+	err := ListenToRequests(cfg.ServerConfig.Port)
 	if err != nil {
 		panic(err)
 	}
diff --git a/models/keys.go b/models/keys.go
index 46308b9..967105a 100644
--- a/models/keys.go
+++ b/models/keys.go
@@ -1,6 +1,7 @@
 package models
 
 var (
+	AuthCookie     = "session_token"
 	CtxRoomIDKey   = "current_room"
 	CtxUsernameKey = "username"
 	CtxSessionKey  = "session"
diff --git a/models/main.go b/models/main.go
index 17583a6..759e3d2 100644
--- a/models/main.go
+++ b/models/main.go
@@ -1,6 +1,7 @@
 package models
 
 import (
+	"errors"
 	"fmt"
 	"golias/utils"
 	"time"
@@ -83,6 +84,25 @@ type Room struct {
 	TeamWon UserTeam // blue | red
 }
 
+func (r *Room) CanStart() error {
+	if r.IsRunning {
+		return errors.New("cannot start; game is already running")
+	}
+	if r.RedTeam.Mime == "" {
+		return errors.New("cannot start; red team has no mime")
+	}
+	if r.BlueTeam.Mime == "" {
+		return errors.New("cannot start; blue team has no mime")
+	}
+	if len(r.RedTeam.Guessers) == 0 {
+		return errors.New("cannot start; red team has no guessers")
+	}
+	if len(r.BlueTeam.Guessers) == 0 {
+		return errors.New("cannot start; blue team has no guessers")
+	}
+	return nil
+}
+
 // WhichBotToMove returns bot name that have to move or empty string
 func (r *Room) WhichBotToMove() string {
 	fmt.Println("looking for bot to move", "team-turn", r.TeamTurn, "mime-done", r.MimeDone, "bot-map", r.BotMap, "is_running", r.IsRunning)
@@ -141,46 +161,6 @@ func (r *Room) UpdateCounter() {
 	r.BlueCounter = blueCounter
 }
 
-// func (r *Room) LoadTestCards() {
-// 	// TODO: pass room settings
-// 	// TODO: map language to path
-// 	wl := wordloader.InitDefaultLoader("assets/words/en_nouns.txt")
-// 	cards, err := wl.Load()
-// 	if err != nil {
-// 		// no logger
-// 		fmt.Println("failed to load cards", "error", err)
-// 	}
-// 	r.Cards = cards
-// 	// cards := []WordCard{
-// 	// 	{Word: "hamster", Color: "blue"},
-// 	// 	{Word: "child", Color: "red"},
-// 	// 	{Word: "wheel", Color: "white"},
-// 	// 	{Word: "condition", Color: "black"},
-// 	// 	{Word: "test", Color: "white"},
-// 	// 	{Word: "ball", Color: "blue"},
-// 	// 	{Word: "violin", Color: "red"},
-// 	// 	{Word: "rat", Color: "white"},
-// 	// 	{Word: "perplexity", Color: "blue"},
-// 	// 	{Word: "notion", Color: "red"},
-// 	// 	{Word: "guitar", Color: "blue"},
-// 	// 	{Word: "ocean", Color: "blue"},
-// 	// 	{Word: "moon", Color: "blue"},
-// 	// 	{Word: "coffee", Color: "blue"},
-// 	// 	{Word: "mountain", Color: "blue"},
-// 	// 	{Word: "book", Color: "blue"},
-// 	// 	{Word: "camera", Color: "blue"},
-// 	// 	{Word: "apple", Color: "red"},
-// 	// 	{Word: "fire", Color: "red"},
-// 	// 	{Word: "rose", Color: "red"},
-// 	// 	{Word: "sun", Color: "red"},
-// 	// 	{Word: "cherry", Color: "red"},
-// 	// 	{Word: "heart", Color: "red"},
-// 	// 	{Word: "tomato", Color: "red"},
-// 	// 	{Word: "cloud", Color: "white"},
-// 	// }
-// 	// r.Cards = cards
-// }
-
 func (r *Room) ChangeTurn() {
 	switch r.TeamTurn {
 	case "blue":