It is in 1280x720. You can adjust to other resolutions by scaling the object in gdevelop.
License: Public domain you may use, redistribute, do anything (legal) you like with this. Attribution, while appreciated, is not necessary in any form what so ever.
To use, just create a large (size of game window) object, load all of the images as animation frames of this object, set it to loop and set desired speed, and then use a high z depth or separate layer to show this effect above other objects.
https://mega.nz/#!S8ISXabB!KfIF2ADR2M-N ... iycqo-HPEY
Feel free to check out the snow effect pack as well.