To me the crab enemies could be made interesting with a couple of tweaks.
- I think if they moved faster going sideways as opposed to straight on, this could make for some interesting defensive strategy. A crab would spawn randomly either horizontally or vertically oriented
- The crabs could scoot, then attack, scoot, then attack. This idea is tied to my next idea
- The crabs should try to surround the player. So, if there is a crab directly in front of the player, the other crabs will try to go to the sides. This, combined with the crabs scooting and then attacking, would create a sort of rhythmic attack system. If a crab scoots in front of the player, the player needs to target that crab first before it goes into its attack move
- Also, the little bugs could slow the character like the little black puffs do in Legend of Zelda: The Wind Waker. Maybe some sort of spin move would get them off, at the cost of depriving the character from moving.
I definitely like the look. It feels dark and grungy like a spooky cave. The death posture of the crabs reminds me of Hotline Miami which is satisfying after a battle. The character movements feel very smooth. The sword movement does not. I think if the swings were a bit sharper and faster, it would improve the feel.