Ok, where to begin? Well, first off, the music is nice and works well with the theme. However, this does not compensate for other areas of the game that clearly need work. For example, the end screen is so abrupt you don't even know what killed you; perhaps fade out the screen for more effect. Also, I recommend taking into account a system of lives so that the player, when hit by a ghost, does not instantly lose the game, but can learn from their mistake and continue playing. Another thing: the ghosts rapidly shoot out from the walls, which takes the player by surprise, but often they move so rapidly that the game is made unnecessarily difficult. Maybe have the ghosts wandering around an enclosed space, rather than having them ejected from the walls, or at least slow them down. If you are going to have the ghosts move so quickly, establish a system of difficulty, where "easy mode" ghosts move slowly and the "hard mode" ghost move very quickly. Gameplay fluency is decreased because of the sheer speed of the enemies. Finally, I think that you should make the levels easier to navigate so that the player is able to jump out of the way when an enemy is on their heels, or perhaps turn around and shoot said enemy, without the added obstacle of having to jump up numerous platforms. The idea of shooting ghosts against an eerie tune is not a bad one, but this game needs a lot (a LOT) of refinement in order to fully utilize this concept.