I suspect you are a big platform gamer. The jumps that the player needs to execute past the first level are probably easy for people who have done a lot of platforming and have that rhythm down. So while it might seem trivial to a regular platform player, I found the difficulty jump between the tutorial and the 2nd level pretty daunting.
I trudged along until the (4th?) level before giving up. The solutions are creative and the game has a whole unified look. Some of the box colors looked way too similar so I did have trouble figuring out what the correct order to pull boxes out was