Use mouse to change direction w or up arrow key to move. use space to dash when you dash you speed up and become invincible for a short time avoid enemies that spawn every 30 seconds. You start with 5 health and 10 dashes. Chickens will spawn every 30 seconds too but die after a while and do 0.5 damage purple enemies spawn every 30 seconds from the 1 minute mark they are stronger than normal yellow enemies they also replace yellow enemies. At two minutes blue enemies spawn these are the strongest enemies. You can also collect health and dash packs which give you health and dashes.
I might try to make a shop so that once you get into late game you aren't too bored. Why did you bother...