Thank you! That's so good to know the puzzle of movement/navigation is resonating with you. It's absolutely what I wanted to build the game around, this idea of a game based on positioning and defense.
And yes, I absolutely know what you mean about how reaching the first upgrade can feel like a dice roll. I was hoping to illustrate early on how much of a difference each upgrade—and the work it takes to get to the next upgrade—can make for your ship. But you're probably right that first one should be easier to grab. I'll have to explore how to best implement that.
You're also right about the audio! Haha.. I sort of shoved it in last minute, otherwise I'd spend way too long trying to make it all perfect. Glad to know the things I did spend a lot more time on work better. Thanks again for the comment!