Better luck next time
First and foremost, congratulations on having a crack at flash, it takes real balls to have a shot but let's be honest, the quality of this flash is rather horrible. Here's some pointers for next time.
My Criticisms:
Artwork - It's simplistic, but not in a good way. Firstly, the figure's head is extremely disproportionate; giant eyes, square pupils, awkward mouth but the pièce de résistance of this array must be the chunks of head lost between hairs. If you had paid more attention, this mistake would've been fixed quickly. However, it looks like you can actually draw to some degree; the figure's torso looks perfectly fine to me apart from the lack of shading concerning the hoodie. The laziness you have shown comes through in every single other aspect of this flash as follows.
Animation - This is crucial to any flash movie, and any animator should take due care in this area. Animating the eyes and mouth only doesn't help your already lackluster art. Also, I did not like the single viewpoint, it convoluted the story.
Story - From what I made out the story follows the interrogation of a murderer who is very childlike in character and cannot comprehend the current situation, infuriating the interrogator. It looks great in words like those, but it was not executed in the best possible manner. Only through the sound could I tell the interrogator was leaving, because there was no other viewpoint to see him actually walk away, which on your part is plain lazy and without animation to tell the story, only the sound could.
Sound/Voice - I'm pretty sure that the murderer figure is a male, so why does "his" voice sound like that of a 5 year old girl? Being a guy yourself, you could have done both voices yourself. Also, the low quality of sound, mixed with the very high voice of your sister (I'm assuming that it's your sister) heavily convoluted the story as I could not hear much of her lines. And on top of all that, the microphone created irregularities in the sound, between the segments of speech, there was an eerie silence - a lack of the crinkly noise created by the microphone. Uniformity of sound would've helped. A further note, when working with microphones, don't hit them against anything or fumble around with them, it picks up those noises which were probably not necessary to the story.
Overall
Your pride probably got the better of you here: "it is my flash, so I don't give a shit what people think, I had fun". If, perchance, these words, or similar, passed your mind before submitting, it really wouldn't have hurt to critique your own flash and fix it up before submitting it to the public. Also, don't forget that practice makes perfect; keep at improving each of these factors individually and eventually you may create something spectacular.