Update 1.5: - Video
1. New behavior of flying insects when attacking. (Now, by changing the settings, you can achieve different behavior when attacking.)
2. Small fix.
Update 1.4:
1. A little optimization.
2. Slightly improved movement.
3. The ability to pause and clean up instances, which will greatly increase performance if the insects are not needed at the moment.
4. Returns the size of the mesh when applying damage to insects. (Now we know exactly what size the fly died.)