It's one of the best. I'd recommend either the Turbografx-16 version or the PSX R-Types disc, depending on which system you have. Or you can try downloading the arcade game from Classicgaming or somewhere else...
I find your lack of faith disturbing.

zero signal v 2.0 The OPCFG West Mansion The Ghoul Realm

Visit The Third Moon and revel in the strangeness...