Ah yes, I thought about adding dialogues after having bought every car and building, but I didn't have enough time. (I published the game like half an hour before the end of the jam, I was afraid to miss the deadline). I also thought about adding achievements to make it worthwhile between the "main story" milestones, but alas, not enough time either. I really didn't manage my time too well.
About the leveling up: that's a good idea, I wish I thought of it.
Truth be told, I don't think you're supposed to reach 100k subs by clicking on it manually. I personally use an auto-clicker!
Thanks so much for your comments, I'm really glad you tried it!!