Ever since I allowed the game access to my computer which sometimes shows up for games bubble tanks has begun to lag awfully. Is there any way to reverse that? Nothing else is lagging.
Is the loading slow (That basically always happens), or the whole game? The reason may be that you didn't give enough cache free for Bubble Tanks to use, meaning it has little space to work in. Check the Flash panel by right clicking the game (Not sure if it appears on Windows) and you should see some command leading to Flash. Change the cache to unlimited or a very high number.
Otherwise, update your Flash, your browser and Windows/Mac. If it persists, it may mean your computer is getting to old and slow, or broken.