the dark blue lines/orbs/spikes/bosses warn you where to not stand, dodge light blue orbs and lines and spikes as well as watch out for the boss!!! (use arrow keys to move your character) UPDATE FEATUES: .up to boss fight area .starting screen .press R to retry .retry screen
credit to @trentonTNT and @travister88 for the idea go check out just one boss by them if you haven't already!!!