Thank you for such nice words, made my morning!
I think the randomised upgrades will disappear and you will get a tech tree instead.
yea I originally had a timer on the button to jump (like you had to survive 60 seconds, but it felt odd. So having the ability to jump if you didn't feel really ready was the best I could come up with - though I plan on revisiting that later.
Thank you for taking the time to play!