I dig the mouse-click samples in the beginning, I've never heard that used in a song before. I think you should try incorporating it more somehow, really mess with it. For a reference (if you're curious) check out "The Bomb" by Neuroticfish. It starts with an old dial-up sound that gets integrated into the intro real creatively.
As for the rest, this is excellent. I'm a bit old (30) but half of my life ago I started with FL Studio and this really reminded me of those weird late night or early morning sessions in which I would make things very similar to this. My early FL Studio work isn't on NewGrounds, but you've definitely got a better first full-length song. I don't have much constructive criticism, it was just nice to hear your work, great job!

This one felt nostalgic, especially the old school drumplay.

Not amazing but not completely garbage either. I feel like this song just needs 2 things; better mixing, and more variation. For the mixing part I feel like you maybe could of done something more with the drums cause they just kinda seemed to appear out of no where and sounded a bit out of place for me, like maybe add a bit of vintage to it? Idk just sounds a bit out of place, also I feel like the melody should be a bit louder as the drums are almost drowning it out. Now for the variation I feel like wasn’t too bad, all I had a problem was the 45-2:05 section was just the sam drums and melody repeating for about a minute although I like how you added some background synths I still feel like it just needed a bit more. Congrats on your first full track and very valid attempt. Good luck with future projects!

not bad for your first track.
and 5 hours(for me at least) is too little lol.
Some parts need some more elements, and possibly add some dynamics in the track.
cow fish out lmao ksja

Nice try :)