Your challenge is to use the green pusher (small square) to push the small red box inside the larger blue box.
Boxes can only be pushed from the inside.
Black boxes may help or hinder your progress.
Hint... a small box inside a large box can be pushed together.
This game is originally designed by Andrea Gilbert and you will find a Java version (as well as many other mazes) on Andrea's website: Clickmazes.
The BoxUp puzzle set was devised by Andrea Gilbert and Don O'Brien (https://www.supermaze.com/).