Problem with 8-direction

Hello guys, sorry if it is the wrong forum, but I have a little problem. I'm creating a simple space shooter. Everything happens inside a tiny arena, and I used the 8-direction behavior to move the starship.

I noticed that when I press the up and left arrows, I simple cannot shoot anything while pressing the spacebar. Even funnier, if the spacebar is pressed, the ship will simple ignore the arrow uo and left combination.

You can see the problem here: geekgear.com.br/games/tinyarena

There are no other key conflicts...

Thanks in advance!

Works fine for me. Your computer/keyboard/browser might not be able to handle too many keypresses at once.

Really? You know, I am relieved to read that. Thanks for the feedback.