At first thanks for the comments and the recommendations. I will take them into consideration.

@Karmington:

on a fail situation there are 3 kind of alarms:
i)   a sad tone
ii)  a vibration (almost every mobile phone supports this)
iii) the displaying of the remaining lifes in place of the score for 1-2 seconds.

However, maybe you are right that some kind of a blinking graphic around the player would trigger more attention on what bad happened and perhaps I will include it on a next version.

Hello J2ME fellows,

I have created a game for mobile phones called Spaceball http://www.spaceballthegame.com

In this website you can find all info about it. A free version is also available there and I'd be glad to read your review.

The reason I write this post is not only for promotion purposes  but also to answer on questions about its "making of"
if you believe that there is something on it that you will need it also for your project.