you're trapped. you don't want to get hit by the bullets. use the arrow keys (or swipe on mobile) to dash. you will continue to dash until you hit a wall. TIP: the middle box counts as a wall. if you change your direction mid dash towards the box, you can sit in the middle of the lane
Thanks to Kevin MacLeod for the music (incompetech.com) and @theChAoTiC-TEST for the score displayer.