I actually haven't seen the movie yet, but I know the trailer so I get the resemblance. My teammate did a cute job with the funny faces :)
The non-cheesy way to defeat the mummies would be to wait behind one of the boxes until the mummy comes over and start walking shortly after it turned towards the top or bottom. But there is another cheesy way I didn't fix because it allowed faster playtesting ;p thank you for playing :)