Update 0.9

Added more blood and meat when killing infantry, detachment of limbs;
Added new music for PMCs;
Some sprites have been redrawn;
Now the Abrams tank has a coaxial machine gun;
Added tooltips and notifications;
Added new sound effects;
The camera can now be moved up and down;
Now the ground shakes during explosions;
Effects of armor ricochets have been changed;
A health bar has been added to units;
Added buttons for quick selection of engineer and commander;
Volcano can now shoot down drones.