For a young dev, it's pretty solid. The tilting ship is a particularly nice touch. I look forward to what you make in the future!
Right now the pacing is pretty stiff, like it's a tutorial you followed rather than a game. Adding in some kind of boss thing, weapon powerups, or clustered enemies rather than one-by-one enemies would add a lot. If you're having hard time making assets, consider teaming up with someone.
When I play a shmup like this, I really want to feel my life is on the line. There are loads of simple tricks you can use: try searching for Jan Willem Nijman / Vlambeer. There's several great videos about simple things you can do to make your game intense!
Pretty solid effort, even if this is as far as you take it. It'll look good on future resumes, especially if you spice it up.