This looked and sounded really good. Great take on the Lovecraftian town invasion.
It was a bit tough for me though. To not repeat what others have said, I think the wall bump HP bump wouldn't be so bad if it was clearer what was and wasn't a space. There're a few places that look obstructed but are actually fine. Though maybe that adds to the feeling of helplessness.
I found a hole in the map that leads from the left tunnel to the pier after the gate opens. And I think there's a glitch where if you click attack too quickly, the enemy will pop off at you in quick succession without your attacks landing. I dies a few times to that.
Impressive entry none the less.
I'll post my playthrough when it's up.
EDIT: Bleak HarbourPt1 by AdamStrange