If you're searching for side scrolling indie games like Limbo and Inside you should try Hollow Knight, the Swapper, Salt and Sanctuary and Deadlight. Ori and the Blind Forest is also a great choice and Sundered. If you don't mind the platformer aspect then I would also recommend Bastion, Pyre and Transistor, from SuperGiant Games.
If you want something to keep playing for a long time you should try Dead Cells, this is by far the best side-scrolling rogue like indie game out there 😛 All these games are super cheap so I would check them all out if I were you 😄