Congratulations on completing your first VN! That's no small accomplishment; you should be proud~
And I enjoyed this one! From the very first scene, I was impressed by the desolate, industrial atmosphere you established with your sound design, not to mention how the wide variety of background art did a great job painting a vivid picture of the environment and scenario. The looooong scroll up the full height of the tower at the very beginning was delightful, heheheh~
And that's making no mention of the perverse, codependent Connection between Col and Sirus! For all of their intentions, these girls really do bring out the worst in each other—and to that point, I would've loved to see more direct interaction between them, especially seeing how things unfold in the aftermath of the ending that uhhhhh has a little more bite to it, if you catch my drift, heh heh heh.
Once again, great work on your first VN! I hope to see more from you going forward, heheheh~