I have my doubts.
Sure there will be sandboxes, but they have bugs and errors too.
Oooh I want to add my favorite: No flying jet packs, unless you can figure out how to create a longlasting stream of gas of sufficient momentum to lift a human which won't burn his legs off.
For a laugh i once calculated the neutrino "jet pack" plausibility. Apart from MW and GW of required power, *even* neutrinos in sufficient momentum density do interact enough to still burn the legs off.
More seriously: About the only thing that would work is go bigger, ie a back pack gyro or something.