To me it looks like it.
v0.5 is just broken (Issue 106, 107) and there are numerous other bugs and quirks for v0.4 (e.g. Issue 103, 104, 105,
this post)
The last commit was over a year ago and it also looks like the issue list isn't actively maintained.
Has anyone a suggestion for an alternative to FunF?
regards,
Markus