Is this supposed to be a Twister Keyboard-like game?
It's a bad idea because some keyboards cannot input certain 4 keys at the same time, wich makes it impossible to continue after a certain point.
The snake-like bosses look too stiff, and the beggining is too long-winded in my opinion.
And maybe you could add some more diversity in the ships, other than just a recolor and a few minor things. Like some sort of fast fly swatter ennemy.
Try improve your typing skill and make the quiz's questions answerable without guessing a lot. Also, the blue/red colors don't appeal very much. Try random varieties until you get suitable colors or something.
It's amazing how such a simple game could be so addicting and good. The only thing it lacks really it something that amkes the player want to continue other than just score or some more variety.
This game is basically B29 Assault featuring only Shield.
And you can compensate for the short time the line stays by drawing it repeatedly. Next time you should make it so the shield you draw has to stay there until the time ends.
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