Decent

The animation was a little choppy though. Try and get the transition from flying to floating a little smoother. Other than that it was a pretty solid flash.

I guess its okay, not really that good.

The animation and stuff is actually alright, but nothing to do I guess, also, whats with the little sperm guys attacking Superman, thats kinda weird. Since it isnt finished, I'll say it's okay, but from what I see here it seems like an asteroids clone, nothing new.
Also, one key has two actions, I dont know what's up with that, it would probably be easier for everyone if you just moved one action a key over and have 'E' be one and 'W' just be a direction. This is the fist game (that I can recall) to give me a choice between arrow keys and WASD, the later is easier since you can keep your hand on the mouse, so I think more people are inclined towards that. Another thing is that your title card kind of made me feel like the thing was going to be poorly done, because it was cluttered and bland and had weird little watermarks that look like the ones every new flash user uses (the green button with two tones so it's supposed to look like youve put shading in it but it just looks bad) . Little things, I guess.

Just walk

This game has no objective this will make people bored

funny!

it's need some sound and music
i'ts fun to fly around but something as a quest would be nice to have
maybe talk to someone for a job or something...etc.

You should have finished it first.

I like the concept though, it was a minute of fun flying around - but you are going to have to find a gameplay element to go with it. Good potential.