Hey, neat concept and it works pretty well! The balance seems like it would be really hard to design, but it seems both fair and challenging. For me, it did feel like things would explode and I didn't realize their health was low, probably because managing five health bars at once is a difficult task. You can keep the health bars, but as an additional visual aid it might be nice to have the part that's low on health glow red to give you a warning before it actually runs out.