I enjoyed it! Really had me focused and it was a quick time passer but...emailforturnitin75 has a point I played this game many years ago and it was that same game he linked. Besides that sometimes the left or right movement gets stuck and you have to quickly click or press the key.
Well, it's creative with the co-op, but that's really the only good thing with this game. It's boring, repetitive, and the gameplay has been done MANY times before. It is also impossible to play if you are playing solo.
This game is almost an identical clone to a game called Bubble Trouble. I have no idea where the flag option is, but yeah, you can't just copy a game like this man. Here's the link if you want to see for yourself. http://www.miniclip.com/games/bubble-trouble/en/
there are some serious issues with this game.
1. lags really bad (lowering quality fixes this)
2. every so often she just starts running to the left of the screen even if you're not pressing D
3. if you run out of time on the last stage you will die ever 5 seconds whether the balls hit you or not(even after you try the level again)
You could improve the game by improving the walk of the character (maybe add some animation) and some more variety of bubbles and power-ups.
It gets a 2.5 out of me because it's too short,he difficulty is too easy and it needs more variety in the form of power-ups and bubbles.