I test on a mac and on two window computers and it work...
If you get the module issue, launch the java8 version (https://slypy06.itch.io/stuck-in-the-time-java8) and make sure you launch it with a java 8 environment (the java 15 version is not compatible with java 8 env and the java 9 or higher env will make this error too with the java 15 or the java 8 game)