Building Rube-Goldberg setup

For this year's Science Olympiad my daughter picked the build topic, Mission Possible. In this the kids have to build a Rube -Goldberg machine to either 1) raise a flag or 2) roll a marble for a certain distance.

There are other requirements: they need to have atleast 5 simple machines , have 5 action transfers, the whole setup should be 30 seconds from start to finish, not more nor less.

"A" and her partner have so far come up with the setup below.




This is the final version of the Rube Goldberg device, which took 30 seconds from start to raise the flag.