I took a look into the Escape to see the boulders that chase Al, and as it turns out, the boulders in the Beta are the same as in the DOS & Amiga versions. But there is a caveat when looking at them in frame-by-frame mode: some of their graphics are horribly garbled.
But I did manage to rip the boulders through a work around:
http://orig08.deviantart.net/69a0/f/2016...ajbua4.png
But I did manage to rip the boulders through a work around:
http://orig08.deviantart.net/69a0/f/2016...ajbua4.png