Only relevant thing I have to say is that cancelled bullets could go away faster. The cancel effect lasts for like half a second, which I can easily imagine be confusing in high bullet density/spawn rate. Goes double for lasers. The effect's cool but it's kinda scary at this slow animation speed.
Anyway, the Jam version's very tough but fair and par for the course for a StB-type game. It may be too hard for non-shooters though which is why I made a video of said version.