Update 0.8.75

Some levels now have a list of primary and secondary objectives. Later, all missions will have such a list.
Detonating missiles now knock Satyrs back a bit when they explode.
Enemy detonating missiles also knock the player back a bit from explosions.
The volume of the heartbeat and the HP threshold at which it appears have been reduced.
The description of the implosion upgrade was extended with information about its damage.
Fixed an issue with the energy capsule near the hoverbike at the Сellular grid level.
Fixed an issue where the bonfire did not work as a spawn point.
Fixed issues with objective scripts on the Abandoned Cliff level.
Minor optimization at the shader level.