I recently filmed a review of classic slots at LuckParty for my channel, and I can say from personal experience that there really is a mix. Some games are as simple as possible, while others have additional mechanics, such as Hold & Win. However, the overall pace is still more relaxed than in video slots. Judging by the comments under the video, two games stood out the most. The first is Panda Shores by Edge Labs. You can see options here. It’s a pure classic with a panda theme, nice graphics, and no over-the-top bonuses. It’s exactly what you’re describing: just spin and enjoy. The second is Fortune Gems 2 by Jili. This one is a bit more active, thanks to the gem symbols. However, it still stays within the classic format and isn’t too complicated. In this category on LuckParty, there are simple options and options with features. Just check the game description before you start playing.