My score was 83! Well done! If I understand correctly, you also did sound and music? Ghosts collision boxes were a bit big, but I don't complain! I actually liked it better :D 

Like the concept. and the visuals.  Nice angle on the playing field.  Wanted it to speed up faster. First few waves were slow. but once it got moving it was pretty intense trying to keep up. 

Started out a bit too easy but this was great once it got going! the particle effects on destroying the ghosts are really nice and audio was good, good fit for the theme too

I like the audio but the ghost hitboxes are a little too large.

Simple and fair challenge.