Thanks so much? Is it not 64x64? Are you sure, what made you think that?
Welp, that's an accurate aspect. Unfortunately, the game engine I used does not have pixel perfect rasterization to my knowledge. That's why it uses extra pixels to smooth things out. The game was originally designed in 64x64 and can be shrunk down to that size without any problem. If I could, I would add pixel clipping but I do not think it is possible.