Fixed a bug with platformer

Before this fix if you played a platformer level and then played a level
made before platformer was added that level would be in platformer. So
for example if you played id 25 and then played plummet then plummet
would be platformer.

Author: Thepuppetqueen57

src/game/loading.rs

@@ -42,6 +42,7 @@ pub fn load_level(
         "F-ALPHA"
     ];
 
+    *current_mode = "1".to_string();
     obj_grid.clear();
     for pair in metadata_pairs {
         let key: &str = pair.split(":").collect::<Vec<&str>>()[0];