Can't rate as I haven't submitted an entry, but I enjoyed this game.
My feedback is as follows:
1. Turn circle is too slow, bug movement speed is fine, but the arc of turning needs to be reduced.
2. Smaller bugs should take fewer hits, with the smallest being one hit, and larger bugs should take more.
3. Implement a dash function to dash forward. This could be tied to the health system. Currently the fist that drops down doesn't hurt you, and I can understand why this is the case, but if you had the ability to dash then avoiding the fist could be part of the challenge.
4. Your own bug should grow as you eat more bugs. Added size slows movement.