First of all. Thanks for the feedback. Feedback is always appreciated.
Yeah, a little equipment list would be nice.
I've added this to the list of things to definitely add in a revised edition.
For example: Should clerics be allowed to wear heavy armor? Conversely, does the limitation on not using edged weapons make sense at all? (Perhaps it only makes sense with respect to a tradition of having powerful magical swords and no such maces.)
Clerics could where heavy armor in 0e. I kept the edged weapons restrictions and the very limited MU weapons allowed to keep the fighter as the only class able to use the best magic weapons.
If we keep the name magic-users, should we also keep the name fighting-men?
This change was to separate it from that first RPG terminology-wise (i.e. was done for copyright reasons). of course, what you can them in your game is completely up to you. Just as rules police goes against the old school ideal, so does terminology police. LOL.
Shouldn’t creatures and player characters die at 0 hp instead of -STR? Should old school mechanics use no stat bonus for melee attacks? Perhaps get rid of them for ranged and magic attacks as well. You need magic attack bonus for ranged and melee touch attacks. Do the old rules have that? Just use saving throws always. Do we need two weapon fighting and light weapons in the rules?
This are things that make the Microlite20 system work well. M74 is supposed to be a version of M20 that favors the style and flavor of that first published "0e" RPG. It is not meant to completely duplicate the 0e rules. Of course, GMs are
not are not only free to tinker, but are encouraged to do so. I may need to spell this out more in the Designer's Notes as modern games seem to favor the rules as written far more than I feel is healthy for campaigns not being ran by the designers.
Maybe add a note that clerics don’t get any new spells at level 12.
Excellent point. Added to the list of things to definitely do in a revised version.
Nitpicks: I’m not sure whether one capitalizes the word after a semicolon; I think one usually doesn’t. (Noticed that in the list of special abilities for races.) Because I’m anal about such things, I’d fix the capitalization of MIND vs. Mind in the text and change all instances of “Mind bonus” to “MIND bonus”.
Noted. Proofreading help is ALWAYS greatly appreciated. It's a skill I completely lack the talent for. When I took the ASVAB Test (Armed Services Vocational Aptitude Battery) in high school years ago, I scored in the 80s and 90s in all areas but one, Clerical Speed and Accuracy -- where I scored in the 7th percentile. 93 percent of the population has more aptitude for things like proofreading and spelling and filling than I do, and it often shows. My ability has not improved much with age.

I love the rule on getting XP for money spent in “frivolous ways”!
I'm glad you like it. It was a house rule I added to 0e after a few months of play. Treasure as XP worked okay, but treasure spent on new weapons, armor, etc. AND still getting XP was sort of a double-reward that I did not like. Plus "wasting" the money was very much in the tradition of heroes from swords and sorcery fiction. Conan got rich in many adventures, but usually managed to spend himself poor again in no time at all. I put it in the rules here as another way of changing things from the original for copyright reasons.
[Edit: Bad typo corrected -- see strikeout and following two words which were added.]