Thanks for playing! I completely agree on the showing next block suggestion, it's something I didn't have time to implement unfortunately. Also, the game was indeed developed at 64x64 as the jam requires.
But, It is. All the sprites are also small, like the box is 5x5. I think the mule is 8x16. Godot has a setting for each image where you can turn off filtering of the images, otherwise it would've looked really blurry. Do not besmirch my low rez mule! ;)
Not sure if that is breaking a rule? If so, I guess it might be too late to change it now.