If you want to avoid the blur issue going on, you should set the filter mode on your sprite import settings to point. Also, if the issues still persist with the weird phantom pixel lines on the tile map after the filter change, having each sprite be one pixel thicker on each side / extruding it one pixel out can help avoid the sub-pixel displaying issues that are unique to the tilemap feature (there are other fixes though, just cant recall them off the top of my head). fun opening scene