Interesting game!
The play window was really big and I had to zoom out the page to be able to see everything. The enemies and some of the environments looked nice, though the main character looked completely different from the thumbnail (I guess she's meant to be wearing a spacesuit?).
The movement felt a bit floaty and slow, the character's shots originating from above her head seemed like a bit of an odd choice, and the ammo mechanic felt a bit too restrictive. However, the warp feature was definitely a neat addition!
The bosses looked very cool, but the first one was a bit too easy (you could just stay in the corner and barely anything could hit you), and the second one seemed really hard. I couldn't outrun the little spawns, and trying to shoot them all down just left me with no ammo for the boss. Also, by standing too far left while dropping into the room, you'd land on the ladder and get trapped inside the door after the boss intro.
The music was really cool and creepy, though!