Not a full guide, just some tips for the final level, The Peckering as we had a lot of trouble.
We did it in 2 player co-op.
The trick was to stock up on tomatoes at the end of round/stage/platform 1 for use in the following 3 stages.
Have tomatoes ready for the 3rd stage where the player on the right has to make Pizza's and its difficult to reach the tomatoes from the right building.
Before stage 3 starts, make sure the player on the left has a plate ready, this will make getting the first fish and chips ready a lot quicker/easier.
Before the final stage, the player on the left can try and prepare some fish and chips and tomato soup and have them ready to go on as soon as the stage starts. You can also get a pizza base ready if you have the time.
This few tips will hopefully save you time, and it will take a few goes, but practice makes perfect.
Below is a video I streamed to Twitch while completing it. No sound was recorded for some reason and my video editing skills are non existent, but this might be some help to any of you struggling with that final level.