fixed tile flickering by fixing camera to pixel grid

src/display/camera.lua

@@ -34,14 +34,16 @@ end
 --- @param y (number)
 function Camera:moveTo(x, y)
     -- TODO: Smoothing function
-    self.target = { x = x, y = y }
-    self.camera:setPosition(x, y)
+    local snapx, snapy = math.floor(x), math.floor(y)
+    self.target = { x = snapx, y = snapy }
+    self.camera:setPosition(snapx, snapy)
 end
 
 function Camera:shake(intensity)
     local t = 1 - intensity
     local vx, vy = vector.randomDirection(math.exp(t * 5))
-    self.camera:setPosition(self.target.x + vx, self.target.y + vy)
+    local snapvx, snapvy = math.floor(vx), math.floor(vy)
+    self.camera:setPosition(self.target.x + snapvx, self.target.y + snapvy)
 end
 
 return Camera