The boss will not spawn new minions if you keep shooting, but I can confirm there is a bug in the tiny minion spawning so even if you keep moving, the minions will periodically spawn tiny minions. I'll fix this when the GMTKJam is over. Thanks for playing and leaving a comment.

Acessing the highscores list from the WebGL version probably isn't going to happen. Therefore, I've uploaded both Windows and Linux versions for those who are interested in some high score competition. Please try them out.

You must have played right after I uploaded the first time, and you must have clicked the full-screen icon that Unity puts on all the WebGL builds by default.   It wasn't my intention to allow full-screen,  so I removed it from the html. It was literally just a few minutes before I saw your comment.  When played at the default resolution as intended, the boundaries are correct. Thanks for the feedback.

Update: From one of the other comments I'm guessing you were talking about vertical movement. That is indeed a valid criticism. Initially I was going to have some obstacles to mess around with in that area but that didn't end up happening.