MastaG wrote:There's OpenJazz which you could port to play Jazz Jackrabbit's Holiday Hare
OpenJazz could do with some love in general. The existing build has some problems with graphics layering, and lacks sound effects. The one available from DCEvo is based on a 2006 build, but the GitHub page has been updated frequently over the past 15 years, so there's a lot of improvements that could be considered.