Hey thanks for playing!
Yeah I wanted to change up how enemies were spawned but ran out of time for the jam. You also might be referencing a bug where less enemies spawn after each playthrough. Just reload the page after each death to fix this, i'll upload a fixed version where this isn't an issue after the jam.
There is some hint of intentionality to this tho, because I want to make you fly around and get enemies to group up so you can chain big multikills together rather than kill them as soon as you see them.