diff --git a/main.cpp b/main.cpp
index ed858e3..3962cdd 100644
--- a/main.cpp
+++ b/main.cpp
@@ -74,6 +74,8 @@ int undo_max = 0;
 int tile_sel = 0;
 int tile_back = 0;
 
+int sprites = 208;
+
 const char* GetPath(const char* filename) {
 #ifdef __APPLE__
     static char fullpath[400];
@@ -146,6 +148,7 @@ void LoadConfig() {
 		else if (strcmp(key, "zoom") == 0) { zoom = StrToInt(val); }
 		else if (strcmp(key, "tiles") == 0) { strcpy(tiles_filename, val); }
 		else if (strcmp(key, "map") == 0) { strcpy(map_filename, val); }
+		else if (strcmp(key, "sprites") == 0) { sprites = StrToInt(val); }
 	}
 	fclose(f);
 }
@@ -456,8 +459,10 @@ void DoTileMap() {
 		for (int x = 0; x < width_in_tiles; x++) {
 			unsigned char tile = map[(map_x + x) + (map_y + y) * map_width];
 			Draw(sdlTilesTexture, x*tile_width, y*tile_height, (tile % pal_width_in_tiles)*tile_width, (tile / pal_width_in_tiles)*tile_height, tile_width, tile_height);
-			unsigned char sprite = map[((map_x + x) + (map_y + y) * map_width)+(map_width*map_height)];
-			if (sprite != 0 ) Draw(sdlTilesTexture, x*tile_width, y*tile_height, (sprite % pal_width_in_tiles)*tile_width, (sprite / pal_width_in_tiles)*tile_height, tile_width, tile_height);
+			if (!keyboard[SDL_SCANCODE_LSHIFT]) {
+				unsigned char sprite = map[((map_x + x) + (map_y + y) * map_width) + (map_width*map_height)];
+				if (sprite != 0) Draw(sdlTilesTexture, x*tile_width, y*tile_height, (sprite % pal_width_in_tiles)*tile_width, (sprite / pal_width_in_tiles)*tile_height, tile_width, tile_height);
+			}
 		}
 	}
 
@@ -480,10 +485,10 @@ void DoTileMap() {
 		if (keyJustPressed == SDL_SCANCODE_R) { Undo_Op(); ReplaceTile(); }
 
 		if (mouse.mouse_down[MOUSE_BUTTON_LEFT] || mouse.mouse_down[MOUSE_BUTTON_RIGHT]) { Undo_Op(); }
-		if (mouse.buttons[MOUSE_BUTTON_RIGHT]) { map[(map_x + cur_x) + (map_y + cur_y)*map_width] = tile_back; }
+		if (mouse.buttons[MOUSE_BUTTON_RIGHT]) { if (tile_back < sprites) map[(map_x + cur_x) + (map_y + cur_y)*map_width] = tile_back; }
 		if (mouse.buttons[MOUSE_BUTTON_LEFT]) { 
 			const int pos = (map_x + cur_x) + (map_y + cur_y)*map_width;
-			if (keyboard[CTRL]) {
+			if (tile_sel >= sprites) {
 				ignoreMouse = true;
 				if (map[pos + (map_width*map_height)] == 0) {
 					map[pos + (map_width*map_height)] = tile_sel;