Great mod! A lot of the subtle things like the pickup sound really add flavor to the homage, and the weapons are definitely interesting. few quick notes:
Some of the weapons feel a bit unbalanced, a few suggestions:
-I kinda avoid the chainsaw, as it doesn't really fit as well and is made redundant by the punching attacks.
-Healing hands heal a bit too slow (even with the ring,) and are a bit too costly for their benefit. If either were adjusted they would prove more useful.
-Coin toss and fists are great. Only thing I would change is starting with maybe 5-10 stand power for maps that have enemies before any pickups (like e1m1 of 2002:ADO)
-The hand bomb becomes practically useless if you don't have a ton of room to melee juke, and when there are multiple enemies/hitscanners. I understand that the range of the attack is pretty true to form, however a simple modification like no friendly fire damage would still be true while buffing it a bit.
-Police girl gun is pretty balanced, while the sprite looks a bit awkward in terms of positioning I get why. I almost spit out my drink when I picked it up for the first time

-Heart attack is kinda op as hell. While that might not be so bad of a thing, its huge blast radius makes it super easy to kill yourself by accident. a lot. Either toning down the blast radius or increasing the cost would help round it out a bit more with the other weapons.
-Killer Queen's fists are good right where they're at, though they make the normal fist primary attack redundant. Since Killer Queen attacks independently of Kira, perhaps it could be a replacement for his normal attack, with just the punch flurry animation instead? That way it could combine with the coin flick alternate fire to consolidate weapon slots.
-Bites the Dust took me a minute to figure out, how it does not warp if it does not hit any enemies. Thats an interesting concept and I like it, but its a bit off from the flavor of the move. Perhaps an alternate fire could make a "duke clone" sprited to be Hayato? Enemies will be drawn to it and when attacked it could trigger the move, detonating off of the attacking enemy's position and warping you to the entrance.
I'm loving the mod though. Its even more fun with the bd20 monster replacer, though you don't get the best boss in gaming history on e3m8 if you use it
