This looked good!
From the description you wrote I really thought this was going to be funny. The flash doesn't even have the part where Miyamoto swims in his pool of gold. You could've done a lot with this "plot" I think... a lot more than this flash. The background remained the same which is boring (not to mention it was pretty plain by itself). The characters did move around and change shape and such which is good but it was kinda minimal. In a lot of humorous flashes the people in it don't stay the shape at all and are pretty abstract.
Unfortunately for you being a girl (I spied on your profile) you sound a whole lot like a prepubescent boy. Maybe that would work for some things but I don't think it matched very well with this cartoon at all.
So I kinda rambled on there. Try to find some advice/criticism or something. Goodluck on your future flashes :)