The game looks interesting. I was a bit confused on the archive file, though thankfully 7zip came to my rescue. I've never heard of an .lzh file extension before.
EDIT: At the title screen, it doesn't appear to respond to my keyboard (both USB and laptop).
EDITEDIT: Installed Rm2k3 from Steam and opened it that way, it runs properly through that. I'm sorry I'm being a pain!