2D Shooter

I think that your proposed modifications sound good, I have a couple of comments:

1. Will the backgrounds that you change be custom-made? This is a great opportunity to hone your artistic skills and put some time into significant asset updates.
2. As a tip, when making new levels, try to make sure that they're significant and unique/different from others in some shape or form. Adding new enemy types, challenges, or obstacles can help with this!
3. Are you proposing increasing the quantity of already existing enemies, or making new enemies that have custom abilities/stats? I'd highly encourage the latter!

Oh man that rapid fire was extremely satisfying!! Loved that!