We've received a number of reports about difficulties playing Bubble Tanks 3 recently. We've reached out to the Hero Interactive team to discuss possible fixes for the game. Unfortunately, the work that needs to be done to get the game updated to work with the newer browsers and the is quite a lot of work and this is not something that our teams are able to correct quickly.
While we both wish there was a magic wand to help make the older games and today's technology work together, Bubble Tanks 3 was released back on Dec 15, 2010, and it's had a long run. We both hope that you had a great time playing the game over the years!