The repeating patterns where you just move to the right and go up and down are just filler getting in the way between me and my nemesis level. However, I'm not known for my patience with this type of game, so take it as a very subjective opinion.
I'm just glad you didn't put in any hazards on the left side - at least not as far as I got! Some players may appreciate the additional challenge, though — especially in the simple pattern levels mentioned above.