Thanks for playing and the feedback. Glad to see some people getting the reference!
With the current waves, yeah, cramming everything at the start is a good strategy. We are doing some rebalancing, including additional entry points, that will add a bit more strategy and challenge.
I like the idea of adding info on the coming waves, beyond just for the boss on the last wave. We already had a comment about being frustrated by the long range firing enemies, so were thinking about something for them, but maybe we update the text for each wave to mention any new enemies in that wave.