Thank you for your comment, we developed this in just 48hours for the Indie Speed Run 3 game jam. So yeah, it can do with a lot more work. Maybe one day we will come back and revisit this and make it a full game
It doesn't really need more "content" (art etc) IMO, rather more difficulty. If the level just looped with higher and higher difficulty -- like classic arcade games tended to do -- that alone would go a long way to make it a proper game in my book.