Nice little web game. Don't really have much to say. One thing I found was that some upgrades seem to stay after you die, not sure if that is intended or not. There also seemed to be a drop in fps when a lot of tanks explode at the same time.
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Depends on what you want to do with it. I don't think it will have any commercial success if that is what you mean. But if you have fun making it then that could be reason enough to continue. If you add some more variety to the combat I think it can be a fun game while on break or during commute or something.