Thanks for trying it out.
Yeah, I'm still tuning speed as it pertains to gameplay - the scroll speed, bullets, and enemies all need to work well together, and I haven't really given it thought among all the other stuff going on yet. Pretty much everyone says the player needs to be faster, so that helps.
The archer shooting speed was actually a bug, lol, it's fixed in the build I'm working on currently (they also only shoot when they're on-screen, now).
Another thing that isn't uploaded yet: when you get enough money to buy from the shop, the game automatically gives you pause time when your mouse reaches the GUI on the right.
And similar to the speed, I made all those enemy values & spawn patterns in ~20 minutes before I uploaded; I'm definitely considering a better curve!