I could tell you put a lot of effort into this but unfortunately I ran into a lot of bugs that made it hard to play. The player ship was almost invisible against the background, and somehow it kept moving above the top of the screen and getting stuck there.
But I know first hand how hard it is to make a game in only 48 hours so what you were able to put together in that short time has a lot of potential! Just iron out those bugs and you'll be making good progress.