The fun stuff:

Awesome game, concept, puzzles, and music! Seriously top quality and the polished levels made it a fun experience I'd expect from like, a 5-10$ mobile game. You have a knack for fun interesting puzzle games fit for a wide audience.

The not so fun stuff:

Had to update to JDK 26 rather than the latest JRE to get it to run (otherwise bit.flip() returning Buffer vs ByteBuffer would crash on start). Supposedly there's javac --release games that are supposed to be played to make the jar more portable for JREs.
I also had a hard crash on drawing folds at very particular angles... console output attached:

WARNING: A restricted method in java.lang.System has been called
WARNING: java.lang.System::load has been called by org.lwjgl.system.Library$$Lambda/0x00000000392d1fe0 in an unnamed module (file:/D:/Downloads/foldl_windows.jar)
WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
WARNING: Restricted methods will be blocked in a future release unless native access is enabled
WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::objectFieldOffset has been called by org.lwjgl.system.MemoryUtil (file:/D:/Downloads/foldl_windows.jar)
WARNING: Please consider reporting this to the maintainers of class org.lwjgl.system.MemoryUtil
WARNING: sun.misc.Unsafe::objectFieldOffset will be removed in a future release
#error {
 :cause "Divide by zero"
 :via
 [{:type java.util.concurrent.ExecutionException
   :message "java.lang.ArithmeticException: Divide by zero"
   :at [java.util.concurrent.FutureTask report "FutureTask.java" 124]}
  {:type java.lang.ArithmeticException
   :message "Divide by zero"
   :at [clojure.lang.Numbers divide "Numbers.java" 190]}]

This is such a clever game! The two tutorial levels were great. It took me toooo long to realise there were instructions on that second level and was getting very creative with my folding.

On macOS, I can’t press the play button, nor advance with any of the keys, and the game won’t start without the -XstartOnFirstThread flag. Looks interesting. Any tips on how I can make it work?