I have pushers (for lack of a better word) in this version, but it quickly became apparent that they weren't strong enough. I've improved them in an updated version that I'm working on, they're tiered now with weaker pushers near the viewport (so the player isn't sent flying to the other side) and much stronger pushers that are a bit farther away. I'll also see what I can do about randomizing some of the sound effects.
Thanks for the feedback!