i mean its an arcade game you cant really go wrong but my brother in christ if youre skilled enough you can get a highscore not even press the forward key

It's uncontrollable. You can go off the screen and the player will be sitting until they refresh.

I don't really like the movement, the ship is just too fast. Also it's not really comfortable to play with arrows because your page just goes up and down.

Can't really say it shouldn't exist though, keep your work up and one day you will make something great.

EDIT: Ok, now I like the movement :)