In this picture The smile should be one “U” like shape, and It adds blocks for some reason. If anyone knows how to fix this issue please help me. Thanks.
This could be a texture compression issue.
Try changing the texture’s format to RGB24 or RGBA32 (if with alpha).
Your sprite is small enough to be uncompressed without risking a large application size.
If that doesn’t fix it, you should try changing the renderer’s shader/material or any active image effects.