Really amazing level design! Reminds me of jelly no puzzle. I had to stop because, actually pushing blocks long distances involves a lot of key presses and I started getting pains in my fingers - not sure that's an easy problem to fix with how the control system works - I think I'd just make the levels not larger than necessary.
So yeah, great game / ow my fingers.
If you'd be interested in being listed on the puzzlescript gallery page, I'd love to add your game with your permission. If you are interested, then just add a link to the source code to this page and ping me (or mail me a link at analytic@gmail.com) - for the purposes of the gallery it's important to let people look at what's going on under the hood. :)