Umm..
I love the genius of this game.. But it's not only hard but illy made. Problem is you give no reaction time as soon as you hit 1 node in easy you have to hit 2 the next time making it hard to react in time and when you miss the bugs block your view a bit so you can't see.
My suggestion make Easy .. EASY not insane make it so that in Easy and Medium you only have to use the 4 arrow key directions instead of 8.