The main vocal pokes out too much in places, like at 1.37. Level automation and compressor.
The percussion: redo it, cuz it's got timing issues.

I mean, you could cut and paste bits to make it work, but it's such a simple part that the easiest and most fun thing would be to do it again.
This one's got a lo-fi sound, which I like. But if you do it again, think more about arrangement - either make it shorter, or make it more interesting with the addition of some different elements.
Nice tune.