Hey Spirit of Music.
I am a fledgling composer so I don't have a lot of knowledge (yet!) about the exact definitions of a minuet, etc. I will instead just talk about the piece outside of that kind of stuff.
The "Minuet":
I rather enjoyed it. Especially from about 0:24 on. I wondered at first whether the piano part would be more varied, but you proved that to be so as the piece progressed. Good development. It sometimes had this neat, time-keeping attitude about it, and at other times an espressive, thick sound. The fast section in the violin part near or around the 3 minute mark was exciting.
If anything, I wish I could hear more dynamic variation. I suspect the fact that it's a midi file has a lot to do with that though. For example, is the violin trill at the very end supposed to be softer (leading into a crescendo), than the midi presents it? It's hard to hear the piano's concluding remarks as the midi presents it. Anyway, pretty cool.
The Scherzo:
I liked the call and response (imitation) with the violin and piano at the beginning and in some other parts.
I like your piano writing in this style. I clicked on your profile and see that you play the piano. I thought so.
At around 1:45 to 1:55, the left hand piano part intruding a bit on the melodic line, but I'm also prepared to hear that that the midi is messing with the dynamic intent. But I am mentioning it anyway.
Overall, that was a light, entertaining Scherzo.
overall
Is the piece intended to just be just two movements? Oh I just read your initial post again, you had an adagio but you thought it was "boring"
Well I was just about to say that it holds its own very well as a two part piece, but I don't know jack about the "rules" of the style you are writing in or whether you care to follow them. I don't think it
needs a slow movement although if you added one in between it would add some variety. Give it a shot, if you want. I bet you could come up with something that isn't "boring" but rather gives a nice flavor to the whole piece.
Nice job!