Good question, it's actually quite important for the atmosphere when opening cases. I would recommend paying attention to
cs cases. They have really great animations that add to the sense of engagement in the process. The opening animations on this site are not only dynamic, but also visually pleasing, creating the right atmosphere of excitement. CS Cases has different animations for different types of cases, and they are constantly updating their design to keep users interested. If you're looking for something with good animations, this site is definitely worth a look. I've opened a few cases myself and was pleasantly surprised at how well done everything is. If you're interested, you can try it out and evaluate for yourself!