A little help please.

[originalusername14]

Help! i keep getting "runtime 53 file not found". Can someone help me? I've downloaded the .zip file.

[RudeGuy]

Can you tell us what did you do when this error occurred? It could help us finding the solution.
Anyway, I assume you were on a world map trying to play a new level, since this error can arrive like this. In this case, the level you were trying to play was typed wrong in the world map (the name you typed in the filename box of that level in the world map is "level 4" instead of "level4", for example).

[originalusername14]

Can you tell us what did you do when this error occurred? It could help us finding the solution.
Anyway, I assume you were on a world map trying to play a new level, since this error can arrive like this. In this case, the level you were trying to play was typed wrong in the world map (the name you typed in the filename box of that level in the world map is "level 4" instead of "level4", for example).

(sorry for answering this late) It happens when i try to open it.

[RudeGuy]

Oh so I assumed correctly?
Anyway, just go to your world map in the level editor and select the level that has problems. The problem here is that you typed a wrong filename, so make sure to type the correct one (you can simply copy paste the name of your level without extension).