Please WGT, replace the 30 sec and 90 sec timers with a 40 and 60 sec one.
30 sec is too short, esp if the meter is bouncing and/or the player needs to adjust the line, choose a different club from the default club, and esp. if the player needs to change SHOT type.
90 secs is too long, even for begiunners.
40 sec is perfect for seasoned players and 60 is good for new players who are learning the contours of the game.