But Cooba, the Bonus Level field is neither redunant nor useless, nor is the Secret Level field. Those two fields, with the Next Level one, provide three alternative endings for a single level.

My list:
- Search for events. You could open a window identical to the Set Event window (it would be called Search Event of course), and then look for the event you want to search for. When you've selected your event, JCS would give you the positions of that particular event in the level.
- Go to warp/warp target. An extension of the search function, and useful once you've placed your 200th warp.
- Ability to redo actions.