Nice job.
It's a good sign when I go back to your first song and it's this good. That should mean for several other good songs also. It was very catchy and had a groovy beat to it. The only complaint that I can think of at all is around 40 seconds or so when you introduce the new instrument it may sound a bit crowded or messy because there is a lot going on at once. It doesn't last too long though so it's not really a problem. Overall, a fun and fast paced submission to listen to.