Shellbreak is a browser-based vertical shooter created by Nathan McCoy for the Experimental Gameplay Project game development jam, where players have two minutes to destroy multi-coloured orbs and score as many points as they can. You can only zap red orbs at first, but by filling up the gauge on the right side of the screen you'll eventually be allowed to break orbs of other colours as well.

Your ship also gains an incremental rapid fire upgrade for every time a new type of multi-coloured orb is added to the range of objects you can zap. The lack of an online high score table is a missed opportunity for the developer, although Shellbreak is still a fun game to play if only to find out how much better you can do at it with a bit of practice.