That's cool! If you're using a "standard" compressor, try these settings sometime, and see if they help: Around 20-30 ms attack, around 300 ms release, ratio 2:1 or 3:1. Set the threshold to where it reduces the gain on the louder notes, and doesn't compress any of the quieter notes. Just look at the gain reduction meter on the compressor to tell. If it is reducing the gain on every note, that's too much. I don't use FL Studio, but I hope this helps some.
You may already be doing all you can do right now with a single compressor, though . That's why I like a multiband, so it will compress just one segment of the frequency spectrum without affecting the others.
Anyway, it sounds good just the way it is, but hopefully one day you can play around with that and have some fun!