I managed to win the game! I wasn't exactly sure how the solar gun was supposed to work. I tried aiming it at the vampires and it didn't seem to do anything. It also seems like the beam isn't aiming where its supposed to be. It aims to the right rather than towards the center of the player's view. I then aimed it at the mirrors and defeated enemies that way. I guess reflecting the light killed them? Though I wasn't sure exactly how I got it to work. I managed to beat it regardless. Though they weren't animated, I thought the models for the vampires were well made. Did you make them yourself?
Overall, nice job on the game!