I have included some basic level editing features and tools in Parabox, as a cost-effective (in terms of development effort) alternative to making a fully-featured in-game level editor. A Unity project is included in the game's files, which lets you create custom levels. And to play custom levels, you have to place the level files in a special folder that the game can recognize. I hope these tools are useful! :)

There are detailed instructions for all this included in the game. (Also, these features are not available in the demo.)

This Custom Levels subcategory (as well as the Steam forum) can be used if you want to share and play others' custom levels.

Its great to see custom level support out of the (para)box in a puzzle game like this.
Whenever i get my hands on the tools i will definitely start playing around with them, and try to make some levels