Potencially yes, the C380 is MIDP2.0 so fullscreen mode should be possible.
You can decompile the game using DJ decompiler :-http://members.fortunecity.com/neshkov/dj.html
The code will likely be obfuscated, but that shouldn't be a problem.
You will need to find the class that extends Canvas, or GameCanvas. (hopefully there will be only 1)
In the constructor for the class, simply add setFullscreenMode(true), then recompile the code.
This may, or maynot get rid of the Command bar/status bar.
If the app. is using lcdui Commands, it may ignore your request to go fullscreen.
If this is the case, you will need to strip this code out, and replace it with your own implementation of softkey Commands.
You will likely need to resize some of the image assets the game uses - and probably alter the positioning of some elements of the game, for it to take advantage of the extra screen space gained.