Well, a common error that new devs make (so like not a criticism, just something to think about :D) is that the pixels are different sizes.Like, take one pixel of the pigeon, its much smaller than the pixel of a tree. A game looks a lot more professional if all the pixels are the same size on the screen. A way to make this possible is to instead of changing the scale of your sprites, just design them bigger. In a pixelart game, you shouldn’t really ever be changing the size of anything - if you want something to be bigger, design it bigger, dont just enlarge it