Thank you so so much for putting the time to try my game and to write all of this. I'm glad you enjoyed it and your feedback truly matters.
I will look into all the technical things you mentioned (spelling, grammar and sound bugs) and come up with fixes soon.
As far as the ending goes, every choice you make matters and the reflection you get after the last painting depends on that...but they're all supposed to turn red. I can see why you felt the sudden change of pace felt forced as I tried to have a cliffhanger for the player. But maybe is better to keep it as a bad ending only.
And thank you for liking the overall atmosphere of the game!