Very well this is my Personal Opinion.
In general using Assets from other people that you are allowed to use(paid or free) is ok however many developers use assets from others as a shortcut Example" A small team of 3 people but they have no artist so they used an asset they found on the asset store that do the job"
As a Gamer and a Developer i do understand people using assets in their game however I'm not ok with people just get multiple assets put them together and release a game without any effort those are lazy/greedy developers that are looking for quick money without effort.
I did look at your games and the moment i saw the Cover images is the moment i know the assets you used
For Zombie Operation you used Synty Studio Zombie Asset and you used a FPS with weapon controller that are available on the asset store(I tried the game)i notice you make a Damage System/Wave System/Menu/UI you did put some work on it so i say "It is OK" Since it is your first game good job
For Battle of the wild West you also used Synty Studio Western Asset and i think you used either Modular engine or Advance FPS and Photon(PUN2).
Again it is clear that you put some effort in the game not just smash some assets together and call it a game.
you are In the OK Zone(For me).