Really enjoyed it, nice to have short games like this that are a nice concentrated manageable does of Sokoban puzzliness. You should make a sequel or something, 2 keys left me wanting more (in a good way!)
Thank you very much :D
Oh, you got 2 keys ? Then rejoice : there are 2 more in this game, just waiting for you discover them ! And a final puzzle at the top-right corner of the world. You should be able to play fo a little while !