Portal Crates

Sokoban style game with simple teleporting mechanics

There are 10 levels. The goal of each level is to cover the target with the crate. A cursor will indicate where you can place a portal (with a plus if you can place it, and a cross if you cannot) by pressing the X button. If you have placed two portals, the next time you press X the two portals will disappear. You can walk into one portal to appear in the other portal, if nothing is in the way. Crates can also go through portals.

Please feel free to leave a comment! This is a part of a personal challenge to make a simple puzzle game every day for a week, with at least 10 levels. I'm using puzzlescript for each game. This is game four.