Bubble Trouble X 

Bubble Trouble X is a simple but enjoyable game in which you are a cute fish and your job is to kill all the enemies in the allotted time, in order to proceed to the next level. To kill the enemies you just need to push bubbles towards them to make them disappear. The enemies are constantly moving in multiple directions and they also explode bubbles to prevent you from accomplishing your goal. There are different varieties of enemies, and some are more powerful than others. As you approach the given time, the enemies will move faster, so the game will get more challenging.

There are some bubbles which have a jewel inside, and if you use these bubbles to kill your enemies, you will score more points. From time to time, some bubbles with power-ups will appear on the playing field, so you should catch them to win the levels faster. The enemies will kill you if they touch you and you only have three lives, so make them count. Every now and then, some bubbles with letters inside them will appear on the screen, which you should explode to collect them in order to form the word "extra" and get an additional life. The game offers only one mode, nice and simple graphics and sounds, and suitable, but repetitive music.

To sum up, if you are looking for an enjoyable game to pass the time, Bubble Trouble X may be an excellent choice.