Octavian,
Thank for catching this problem. One of the .t files required Config::Hash and that was not properly written in the Makefile.
I removed that dependency and released Kelp 0.217 on CPAN, which should install with no errors.
Keep in mind that Kelp may not be fully Windows compliant. I can not guarantee that it will fully work under non *nix operating systems.
It's a good sign, however, that you were able to get it going.
I have not run any comparison test and benchmarks (I intend to do that this weekend), but I suspect that Kelp will rank significantly higher than the rest in both performance and memory use.
In order to not hijack Plack's group, I have created a new one specifically for Kelp:
Please feel free to post any issues, questions or comments there.
Regards,
Stefan