Nice idea and concept, but needs more polish and work on it. First I thought I was shooting at the balloons/bubbles to get points and was wondering why they were not being destroyed. :D Then I realised the health part, and then it was relatively easy after that. I couldn't figure out when I should use the switch, since I was able to avoid the lasers as well on the main camera view.
Great job on completing a game though with a proper flow from start to finish, it ain't always easy and this is a nice job doing all by you guys!