Liked:
- The music!
- The difficulty curve
- Seeing the mayhem you have caused, a battlefield filled with slain bugs!
Liked less:
- A bit unclear if the damage over time you recieved (when you have smoke coming of you) was from stepping in the bugs lava blood or just being to close to it.
- Waiting for lava to despawn (when main path is blocked by it)
- No way to regain health (armor not counted)
It is a fun base, I enjoyed killing bugs! The suggestions I would have for polishing is mainly about the guns, which is the main feature of you game. Since you are shooting a lot, the guns should have a "hold to shoot". Think of it like this: If I want to fire the gun with high precision at specific times, I want it to be click to shoot. But if I just want it to fire all the time, I want it to be hold. And increased firerate only matters for hold to shoot as well.
Currently the machine gun is a bit overpowered. I think you could introduce reloads for all the weapons, to make it so there is a reason to swap between them in a pinch.
Small nitpick is to make the death-sprites be oriented like the bug was at the moment of death. Would make sense and result in a screen at the end of the level that feels more chaotic :)