Hallo @TristanTheTristan!
Even your Sonatina has a length of a Sonata, I think it was wise to call it „Sonatina“ only, due to its youthful spirit and its refrain from the drama and heaviness of a „full-fledged“ sonata.
So it is a cheerful, enjoying piece at all!
However, what refuses me to count it as a piece that I would enjoy to put in my playing list is its hyperactivity expressed by the much to fast and repeating passages with ornamentations (trills, tremolos etc.) which heavily remind me on your signature „TristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristanTristanTheTristan ….“.
I can therefore only emphasize @PeterthePapercomPoser' questions about playability for a human performer and would love to hear the piece as it would be interpreted by a real pianist, whether it's a live recording or a recording from a MIDI file. In the latter case, however, more sensitivity to the technical abilities of a human pianist and their enormous nuances in articulation, dynamics, tempo, etc. would be required.