A little test of a UI renderer. 100% pen. Run on turbowarp.org with high quality pen turned on to make it look even nicer :) Could be useful in the future for those of you making 100% pen projects, and don't wanna deal with UI yourself. Not useful yet though as there is no documentation and only a handful of UI components.
Update history: v1.1 - First version. Included text, checkboxes, sliders, and draggable objects.