#1 When you go down the ship where the cabins are, use the Snack machine to get the first secret.
#2 In the room full of boxes, you can jump on top of all boxes (about in the middle way of the room). At the top of the stack is a button which will reveal secret #2.
#3 In the same room , in the corner is a big box. Jump to the box and get third secret.
#4 After getting the Blue Access Card, the last light panel in the blue room has gone down. Go inside!
#5 When you get again to the box room, turn left right after the elevator.