SuperSpruce

Try out some incremental games! Some good popular games in the genre are Cookie Clicker, Realm Grinder, Antimatter Dimensions (and its mods), and there's a whole world of little niche incremental games out there waiting to be discovered.

I wouldn't recommend this game for studying. It has a tendency to hook you (in a good way). There's a reason why people sometimes call it Cracktorio.