I think the music's pretty good. I feel like I'm missing something, though. I'm not sure why it plays a sound effect every time I left click, because left clicking doesn't seem to do anything. I feel like this game could have been more fun with a slightly higher pace. Maybe the pace could increase over time?
It also pretty often plays the shooting sound effect without actually shooting a projectile and I'm not sure if this is intentional.
Also, if you play the game in full screen, the spider doesn't exactly follow your mouse position anymore, making it hard to play.
Good luck on your future endeavours