No it's not much like Sokoban, but there are basic similarities. In Sokoban you can push as many times as you want. Here you can only push one thing once. However, there are guns and in later levels there are two characters. But it is like Sokoban in that you have to think through the whole play before making your first move, especially on some levels.
I just got through all 21 levels of the Puzzlescript version. It's tricky but very satisfying. Try it!