I am new to Pond5 and I am looking for some feedback on my tracks

Hello. I am new to both Pond5 and music production in general. I am currently in the process of uploading my tracks, however I would like to hear some feedback on them before I upload any more in case there is something that I could be doing better. Any help would be appreciated.

Here are some examples:
https://www.pond5.com/royalty-free-music/item/283158079-halloween-waltz-music-box-and-strings

https://www.pond5.com/royalty-free-music/item/283050755-calming-lofi-piano-lofi-electric-piano-loop

https://www.pond5.com/royalty-free-music/item/283325745-suspenseful-scene-horror-strings

https://www.pond5.com/royalty-free-music/item/283128926-background-pizzicato-strings-pizzicato-cello