I just finished buying the last two skins I needed but, the achievement did not unlock. It says I only own 2 out of 11. Going in game I selected every skin to check and all say preview. Is there more to this that maybe i'm missing?

is there a big sale for this game?? I want to buy this game when it's 80-90% sale, but I cant find it yet :(

This game has potential if there are level efitor and share them through workshop