Yes you're totally right, the movement speed matches the music really well (which is pretty cool by the way). It all comes down to personal taste but it totally works. :)
The pre-spawned enemies are a good idea. But would there be the possibility to just not let enemies spawn in or in the direct vicinity of the player? Because that's the actual problem. For me at least.
But those are just small details. As I said - it's a really nice game. :)