Hi
I agree with previous comments. Applets have become almost completely unusable especially since the latest security changes and it’s the same for Java Webstart. Applets have been unreliable for years, I stopped using them in 2006. LibGDX has a GWT backend, it’s a good compromise, you code in Java and the end user doesn’t have to use the Java plugin in the web browser.
Would your game be suitable to be played inside a web browser? Lots of people prefer having nothing to install or the impression that there is no install. In my humble opinion, some kinds of game aren’t pleasant to play inside a web browser anyway.
I have worked on an alternative to Java Webstart, JDT and JavaFX native deployment for several months after having failed to install a game using GetDown. The end user has still the impression to install something but it’s straightforward as she/he doesn’t even have to choose where to install it and she/he can run it again and again without using the web browser, by using the start menu. I plan to add a fallback in case of limited rights on the machine but I’m not sure that I will succeed. It’s difficult to keep it simple and to provide some options to handle corner cases.