Congratulations on your first game! That's already quite an achievement. It's already a real solid entry. It is complete with music and enemies, and a menu, and different weapons. The particle effects are very cool. So great work there. Try working on balancing the game out a little: it can get a little overwhelming really fast for the player even if they are playing perfectly. But again, well done making your first game. Keep going! Keep making more. You can only get better at it.