Over on Steam, there is an update for the testers:

– Fixed the “The beginning of forever” achievement from unlocking during the instruction.
– Made a few achievements more difficult to get since things are just unlocking like crazy.
– Locked two of the vessels you start with.
– Fixed achievements unlocking for destroying a boss. (fixed in D18.6)
– Removed boss multipliers since there has been a new score for weeks and the boss multipliers are now unnecessary.
– Removed boss difficulties.
– Fixed the default settings having the incorrect default resolution.
– Fixed the fish bomb of the second boss which should fix a lot of other issues.

Here is a video of the fixed boss fight…. spoilers?