Excellent Cacoward winning gameplay mod with a crisp HUD, clever enemies and awesome weapons.
The most recent version is 0.2a, and the author has not updated it in many years but it is very playable and fun and to this day remains one of the best gameplay mods around IMO.

Side note:
I made an add-on for this mod some year ago.
It adds more monster types consistent with the ones in Project MSX:
https://forum.zdoom.org/viewtopic.php?p=701153