It's always great to see some effort put in
Flash artists take note!
Three things that always improve a "feature-length" animation:
1) There's a discernable plot
2) The voice-acting is appropriate for the characters
3) The audio never gets background noise or static-y from the input being too loud
Those three things show attention to detail and really helps to show things off as a high-quality work. "The Golden Mushroom" did just that and it's noticeable. Great work, guys!