Hello! 

I just released a small free platformer/sidescroller asset pack.

You can check it out and download it here:

https://akannis.itch.io/starter-platformer-set

It contains the starter essentials for a platforming/sidescoller game: a small platformer tileset, a small water tileset, 2 layer background, with a tileable layer, some objects like trees, grass, mushrooms, and a few more.

Hope you like it!