Thank you for your feedback :) It’s not much of a tutorial but it’s good enough for the time I had I suppose ^^
I actually used a timer that can be different for each planets (the value is only different for the first planet), the one of the first map is 20 seconds (other planets are 5 seconds).
Since I knew the messages, I would just spam-click “ok” and it felt like a long wait before the first waves ^^ I would not want the players to think nothing is happening.
If I had time, I would’ve make the game start after the player acknowledged the last message, for instance.