Hey! Yes you need Java 11+ to play. It is indicated on the download but I’ll update the game page to mention that too.
Viewing post in Glutton for Punishment jam comments
On the oracle website, in order to download the 11th version of Java, you need to be registered there, which is not very convenient, by the way. If you also attach a link to the installer somewhere in the description, at least, that would be great. It's just really frustrating that it looks interesting on the gifs, but you have to go through a very uncomfortable way for just launching the game.