Well, after a week-long delay caused by some personal problems, the work continues, and I am confidently moving towards the release of the game. All models are ready, all weapons are ready, the whole core is ready and debugged, there are 1 type of monsters and levels left.
The estimated release date is October 31, 2019.
A few new screenshots:
Shotgun SFX 
Rockit launcher! 
Rocket explosion 
DDDoom DDDoublebarrel DDDestroying! 1 
DDDoom DDDoublebarrel DDDestroying! 2