Personally I think Nebula pillar is the most annoying with the floaty eyeballs that shoot lasers. Also the little hound creatures pink cloud crap they send after you can be annoying with that pillar.
After Nebula pillar I think it is a toss up between Solar and Stardust. Crawltipedes and Flow Invaders are the annoying creatures there imo.
After Nebula pillar I think it is a toss up between Solar and Stardust. Crawltipedes and Flow Invaders are the annoying creatures there imo.