update (1.10.0)

• bug fix

1. Fixed an mistake in the enemy's melee attack code.
2. Fixed an issue where the map would break when using the "Practice area" voxel editing feature.

• performance

1. Changed to draw images and fonts on GPU
2. Did reduced CPU load when a lot of sounds are playing.
3. Changed to stop game loop and drawing when window is not active.

• Weapon

• added "HevyCannon"

Heavy Cannon uses ammo type "Shell" to fire seven bullets in one place.

• added "ChainShotgun"

The chain shotgun uses ammo type "Magazine" to shoot bullets radially at regular intervals. You need to roll the barrel before launching.

• changed "Binoculars"

Changed so that the reticle shrinks when looking through the binoculars.