I like this a lot.

The first minute or so, the synth seems just a little harsh to the ear (in the same way square and sawtooth waves can be kind of grating) - would have been nice if the sound were a bit mellower, but otherwise the everything sounds fantastic.

The melody that comes in at 1:08 has kind of the opposite problem. The timbre is fine, but the melody just kind of dawdles. The first section has a nice compact little loop that resolves itself, whereas the second section sounds like it's TRYING to do something more complex (like a question/answer structure) but doesn't really resolve itself

The ending is also a bit weird - the snare just stops suddenly and it while it works fine for an instrumental, I feel like it would be a really weird way to end the song if someone were rapping over it.