@TheKitchenSink: thanks for the feedback
i cannot implement net play right now cause i dont have any server, but when Kongregate provides one i will work on net play.
@absenm: thanks for your feedback.
as the keyboard control, wasd is default for many action games so as gamers is concerned there will be no problem with that, one thing is, how do you do to put 2 players in 1 keyboard? thats why i choose WS and arrow keys for player 2 has some sense since it follows the screen position. but i'll see if i can add some KEY redefinition.