Very original idea! The controls are a bit buggy however, it looks like if you press a button for too long it's not registered as input. Also I found quite time consuming having to retract everything just to create the same mirrored shape. I think making the ruler flip with the character would speed up things quite a bit and make everything flow better.
Viewing post in The Scaler - GameJam jam comments
You are right about holding the button to long. It's a side effect of implemented the "hold to destroy" action. Should have fiddles around with the settings more or put the destroy all on another button. And I do get that mirroring the scale is annoying. Personally the scale controls needs lots of improvements :'D
Thanks for playing!