ohhhhhh my favourite childhood mario party board :O
Neato! I didn't grow up with Mario Party 2, so I don't have a "favourite childhood" board, but this one's pretty good, ngl.

Anyway, addressing the feedback...
-m2 and 4: Not sure if this is controversial, but you could add a tie between the two notes in the R.H. to show that the trill continues from the note in beat 1. Currently, it may look like you need to lift your finger, restrike the note and then do the trill. Making the first note a dotted half note while keeping the triller where it is could work too, though it may look a bit confusing.
I didn't do this originally because I wasn't sure if this worked or not. I referred to Gould and, while she doesn't mention anything explicitly, her advice would seem to suggest that this works, particularly since the trill line helps clarify. So, I've tied the quarter to the half note. Let me know if this looks off and should be changed!
-m5 and on: If you want, you can put a tenuto marking on the 3rd beat to emphasize that this beat is not played staccato. You could also put a simile marking after 2 or 4 bars or so, so you don't have to show all the staccatos (and possible tenutos) in all other bars.
The tenuto makes sense and does clarify the articulation pattern, so good idea! As for the
sim., I've never done one before and so I didn't use one originally, but since the LH never changes the articulation pattern, it's pretty reasonable to use one here. I've included it, however, since I haven't used one before, let me know if my positioning is off, something is ambiguous, or other such derp-age has occurred.

-m5 and 9: Is there a particular reason you started the slur on beat 3 instead of beat 2?
To me, the legato doesn't begin until beat 3. I can hear slight breaks for the two eighth notes that come before, but afterwards I cannot. However, I would say it does look nicer if the slur starts on beat 2 and, arguably, would be better for playing (and it's probably not even a big deal). I've changed it to beat 2 for now, but if you believe my rationale is justified, let me know and I can switch it back.
-m6 and 10: The D's on beats 3 should have a staccato too.
Good call! Fixed.
-m7-8 and 11-12: I think I'd prefer having beats 1 here as A# in m7-8 and E# in m11-12, as they're the M7 and #4 in their respective chords.
Sounds good! I went through like 3 or 4 different accidental combos while going through this originally. This was one of them that I had considered, but I wasn't sure of which was the best, so I just picked one I thought worked.
-m10: The F on beat 3.5 is in that soft xylophone background right? I actually don't think you should add it in, as it's not part of the main melody you're transcribing.
Fair point. REVERT!
-m20: The D grace note should be a D# I think.
I was pretty sure I had this as a D#, but I guess I didn't? Maybe it got lost somehow. Anyway, it's there now.

-m27 and 35: I think you can put the G-Bb dyads in beats 2 and 3 in the treble clef, for a bit better readability (arguably also for the F-A's m25-26 and 33-34). Though, if you wanna keep them as is, that's fine too: the stepwise motion makes the ledger lines a bit more managable.
You make a good point and I certainly don't prefer towers of ledger lines in my music, however, in this case, I think what I have works fine. There are several issues I have with moving them up and one such issue would be ambiguity with the 8va that controls the melody in measures 25-27 (this wouldn't be an issue in measures 33-35). I'm also not sure if I should just move them as if it were cross-staff notes, add LH brackets, how the stems of the RH should be oriented, etc. That said, if you have a nice elegant solution that works, let me know and I'll gladly put it in! But in my limited testing, stuff looks weird and I'm not confident enough in what I'm doing to make that change.

-m29: Though I can hear the F here is timed a little laidback, I think it's still better to just write this with D# and E grace notes and a dotted half note F.
Good call! It certainly cleans that measure up really nicely. That said, should I add something that makes it sound more laidback? Or is that something left for the performer?
-m30: What you have is not necessarily wrong, but you can write the tied 8th notes F's on beats 2.5 and 3 as just a quarter note too.
Interesting... I wouldn't have considered that before. Anyway, I've made the change, but given the slew of tied notes around it, I thought it looked pretty nice with the tie. That said, if it looks good to you, it works for me!

-m33: I don't think the grace note is here, I just hear the F connected to the E in m32.
Yeah, definitely not necessary with the whole section under a
legato. Derp.

Removed!
-m37: I remember seeing a question about the beaming from this bar on discord, though in 3/4 I don't think it's as much of a problem to use two dotted quarter notes.
Would you mind expounding on this? I definitely am still learning about how rhythmic groupings work, but based on my present understanding, I think what I have is good and the Discord members seemed to agree. However, if there is some good reason why two dotted quarters work here, I'd like to know it! I'd be happy to make the change once I better understand "why" that change is better than what I have.
About Boo House, the only thing I can say is that the G on beat 1.5 from m2 would probably work better as a staccato 8th note (instead of 16th + 16th rest). Otherwise this looks fine! (It kinda sounds like the first 8th of m1 is two 16ths, but I believe that's just a percussion note that's throwing me off)
Yeah, that staccato eighth cleans it right up and definitely makes it look better. Thanks!

That should be everything! Thanks for all the feedback, Bloop! I really appreciate it. (Hopefully, you didn't get carpal tunnel after typing all that up.

)
I've updated both files and feel free to let me know of additional things I can fix!
