0:19 - I expected more punch from the kick, and way more bass.
0:38 - I take it back. Good stuff!
The bass is a bit repetitive for my taste. Maybe try chopping it a bit?
1:17 - Aaah, my ears! Distortion.
1:36 - Wait, I just heard that? IMHO not enough buildup.
About the way you decided to end it - Sounds like it should continue. If it's a demo cut, it's fine. If that's how you ship then something's missing.
But overall, it's not heavy on my ears. It sounds good!