The music hits the ears quite hard. Probably because of the repetitive part which is very short.
And also because of the sudden switch to the beginning of the music, after pressing “restart”.
Maybe it would be easier to not depend on the buttons and just cycle play?

And, how do I understand, that there is only one spike and it constantly teleports? This becomes noticeably intermittent and confusing. You see a model in one corner, and she teleports out from the other side at moment later.
Maybe you should make 2-3 enemies while one is flying and the next one is getting ready (queue)?