I've been working on this for a while now, and I've finally made it!!! I still can't work out how to hide the timer yet, so if anyone knows, leave suggestions in the comments please! Added in v2: now the timer is improved, and the score is calculated by adding the time you survive to the number of knives dodged.
I also can't work out how to make a leader board so leave high scores in the comments box! ▒▒▒▒▒▒▒█▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀█ ▒▒▒▒▒▒▒█░▒▒▒▒▒▒▒▓▒▒▓▒▒▒▒▒▒▒░█ ▒▒▒▒▒▒▒█░▒▒▓▒▒▒▒▒▒▒▒▒▄▄▒▓▒▒░█░▄▄ ▒▒▄▀▀▄▄█░▒▒▒▒▒▒▓▒▒▒▒█░░▀▄▄▄▄▄▀░░█ ▒▒█░░░░█░▒▒▒▒▒▒▒▒▒▒▒█░░░░░░░░░░░█ ▒▒▒▀▀▄▄█░▒▒▒▒▓▒▒▒▓▒█░░░█▒░░░░█▒░░█ ▒▒▒▒▒▒▒█░▒▓▒▒▒▒▓▒▒▒█░░░░░░░▀░░░░░█ ▒▒▒▒▒▄▄█░▒▒▒▓▒▒▒▒▒▒▒█░░█▄▄█▄▄█░░█ ▒▒▒▒█░░░█▄▄▄▄▄▄▄▄▄▄█░█▄▄▄▄▄▄▄▄▄█ ▒▒▒▒█▄▄█░░█▄▄█░░░░░░█▄▄█░░█▄▄ #ninjaforlife