Awesome work once again!
Honestly I can't wait for the next update, ngl.
The game is getting more and more flushed out, it's impressive how far it has gone already.
As for some suggestions, perhaps it could be interesting to give the crabs a small animation where they spread their claws before they lunge? I did think it could be frustrating to not know when they're going to jump, unless that's part of their charm.
For weapons someone mentioned a radiation gun, I like that idea, perhaps it could be some kind of short range weapon that does that blast thing with nuclear explosions where everything gets incinerated by the heat and it does that puff of smoke on everything (I don't know if that's really clear though, explaining is not my forte)
Anyhow, wonderful work, I'll keep cheering you on!
Cheers