Hey there! I'm glad you liked the game! The searchlights were made to symbolize cones of vision of the enemy, so because of the stealth system they update. This will be reworked for the next update so all i can say is "i'm working on it".
I've just updated the game and made the base resolution 1920x1080p, along with some resizing of the UI, so it should be less intrusive. Even then, I'm thinking of redrawing it more in the style of BloodRayne Betrayal.
Before enemy variation i'll rework the AI, on this version the pathfinding was updated but it's still quite far from where I would like it to be. I'm planning to include a "hearing system" so that certain player actions cause the enemy to go and investigate the place.
Look forward to it!