Credits and materials:
Background music: "Retro Platforming" by David Fesliyan
All the rest was made by me within this 3 days.
I am author and owner of all tiles, models, sprites and sounds of this game, except main theme of this game. This music is royalty-free, and need mentioned in credits, so:
Music used from https://www.FesliyanStudios.com
Theirs policy: https://www.fesliyanstudios.com/policy