Full video walkthrough, a good tip is to just take your time. Most levels you will benefit from understanding what to do before speeding into a mistake which results in starting the level over. There are no mid-level checkpoints. For the levels where you need to go fast, just keep at it to learn the route you need to take, it might take a few tries but they're not that bad.
Video is timestamped every 5 levels in case you need help with one.