Generalize a "Lost at Sea" game module

[cjqian]

Currently, this is the only game in the platform. We should consider splitting up the variations as tasks. From the tech doc:

It would be nice that once the module is created, it loops over all the items (in a randomized order) (6) + 8) to be discussed which way we can devise to organize module repetitions and loops)

• Make the automation of experiment creation easier.
• Make it possible to create a set of items that will be used (and a button to do random assignment, and ordering).