Level Development: App Crashes

Here are the main reasons for app crashes.
Please post any other reasons if you know some


- Missing Files (GFX,LvL,...)

- Elevator hasn't two collision-points (sprite 79)

- Extra Life reaches the bottom of map (especially attention on fly_right levels)

- Exit is to big or small (since WIN7). If you get an error at the level exit, try to make the exit bigger and sometimes it will work fine.