Copy-pasting and the 'palette' system are designed to let you re-use solutions between levels.
![](https://img.itch.zone/aW1nLzU2MzI4MjEucG5n/original/Ktc0nF.png)
I really wanted an entire solution to be visible within a level, not hidden inside a link or a composite module or something like that.
Very happy to hear you enjoyed the game! :)