move the guy with the mouse and click to shoot
...and right click to brake
I like the concept, and the music and visuals are pretty charming, but the game lacks in it's gameplay. I was able to last pretty long just spamming spacebar, and it seems there is no way to avoid actually getting pushed into the door, so the game is pretty much just spamming click/space until you lose. I think if you added some more mechanics this could be a great game, just for now it lacks in the gameplay.
I suggest adding SFX to the game. Also make the flies less difficult to shoo as more flies appear, as after some times the game gets unplayable. On top of this, sometimes the flies spawn outside of the edges, making it feel unfair when you're shooing one fly and another pops up and ruins the burger. All this aside, good game.