I agree with the other reviewers about the controls needing improvement. In my case, in the middle of the game I brought up a popup asking if I wanted to add this site as a bookmark which I had to cancel, and later on the game's window just closed on me. I'm assuming it's because I'm on Chrome so Ctrl-B brought up bookmarking stuff and Ctrl-W closed the window, so I would highly recommend not making the button to fire your laser be Ctrl. But, from what I could see before the window closed and I re-opened a new one to write this review, the game is actually pretty good if it doesn't run into these issues.
Plz to allow custom key bindings and re-upload and you'll prolly get a way better rating. (The other potential issue is that there are certain simultaneous keypressing conflicts that might make the game unplayable down the line if I can't move like I would need to.)