Nice, everything seems to be in order, found no bugs.
You certainly have an artstyle going on. I know controls are on your game's page, but some in-game instructions wouldn't be remiss either.
Also wasn't sure when the first enemy appeared whether they were hostile or not, because the chill synth was still going. Maybe an enemy music would be nice. It took me a few salvos until I figured out you need to shoot the head. (Edit: I think it is more obvious for people who played third-person shooters with tank controls, like Resident Evil. Looking for where the laser turns into a point on a surface)
Keep at it!