Sometimes you have to press the green flag twice. Dodge the shurikes or shuris for short to advance in 10 levels: Basic Life, Moonlight, The Five Oceans, Bright Light, 1942, 1943, 2013, Paranormal, Heaven Light and End Times. Levels will get 10 seconds longer as you progress through them starting from 90 seconds. You can get the shield power up for 10 seconds if you get it in time. Use it to dodge shuris but not super shuris. A normal shuri acts normal while a super shuri will come in a string of 30 shuris and keeps following you unlike normal shuris.
There is a dark mode timer where you have to collect the dark mode powerup in time and if you don't then you lose. Now the attacker literally attacks you with his body.