Reminds me of those crappy mobile ads, but actually done well
I probably shouldn't have saved all of the armory blades for the end. Got a score of 24 million
That was more or less the intention, to take that simple concept and make something fun and interesting out of this, to give it some substance.
There are a few very intended vorpal blade uses other than the tutorial one, but there is a decent amount of vorpals over the course of the run - elixirs are the ones that you are expected to save till the end. You definitely can save every single elixir until just before picking up the crown, with the exception of the single mandatory one that stands on your way - doing so will skyrocket your score into billions. It isn't the easiest thing to do, but it is very much possible to optimize things that hard.