Bubble Trouble is an awesome retro shooter game. You control a character with iron chains, and your mission is to shoot down the bubble and not let it fall on you. When you pop a bubble it splits into two smaller ones. You have to keep splitting them until they disappear. You'll see some collectable symbols, coins and other stuff. Collect them. Note that you only have a certain time limit to complete each level and you must try and destroy all the bubbles as quickly as possible, the faster you shoot the ball the more points you will get. Have fun.