Use up and down arrow keys or w and s, don't touch the rockets. Your level sometimes changes, and the rockets get faster. To win the game, you'll have to pass level 5. With each level spawning rockets more often. Will you survive the Bats of Dark? Will you defeat them? Try now!
Thanks to Geek Tutorials on youtube. Oh yeah and by the way, when you start, It might say level 2, so just refresh that. Also sometimes all 5 rockets come at you and it becomes impossible to win. Sorry about that. I don't know how to fix it right now. Don't put your mouse pointer over the line either.