It works well in my PC. I tried ir a bit and could make an simple puzzle game for my Motorola C650.

To develop games, perhaps you will need a Mobile Emulator. The M2EE Java package have a good one.

Here a "Hello World" programm
[pascal]
program HelloWorld;
begin
drawText('Hello world!', 0, 0); //write text in the buffer
repaint; // blit the buffer to screen
delay(2000); //wait to end.
end.
[/pascal][/code]