I played it for a few minites. It's pretty good for a first game. You didn't neglect sound, and there's a bit of dialog to add a "story" and a reason for what is going on. The art is nice too.

I think a bit more polish for the projectile impacts would be nice. When I first managed to hit an astroid, nothing happened. Maybe make it flash or add impact particles with a sound so the player knows it had an effect.

I did not like how the ship controlled, but that may just be me. I also wanted to be able to press a button to fire so I could time the shots.

The powerups were good! And having an icon on the screen to indicate which is active was a nice touch. But I would ditch the dark panel behind them. If icon visibility is an issue, then make those icons more visible. Maybe add an outline to the icon themselves.

Keep at it! You're off to a good start!