This is miles away better than Worms! Worms is turns-based, in this game you have total freedom to shoot whenever you want! with the exception that you have to wait for your weapon to load, depending what weapon you have, and the power it has, it will be the time you have to wait before you can shoot again.
An easy example, the railgun has no loading time so you can shoot instantly, the normal gun has a short time to load and the Death Head (the most powerful weapon) has the longest loading time.