Very fun and satisfying gameplay held back by a baffling combo system whose timer is so short it punishes you for playing "too cool" and getting multikills with the same specials that combos feed, because a cleared screen means a reset combo if the next enemy takes too long to show up. Plus weapon specials take time to charge, which is time not killing, which kills your combos.

This along with multiple unlocks being tied in this system makes replaying again and again to go faster become less satisfying instead of more.