It took a bit, and several deaths, to figure out that I could reattach to the machine. I only went back after finding the wrench to see if I could use it on the machine. After that it was pretty straightforward what to do. I only died once after that when I was heading back and saw one more piece to collect, that cost me the last seconds I needed to make it back. I only got the initial Idle upgrades, as that was the least important to me for playing, and then they were removed after getting all the others. It would have been nice if that had remained as an option when the other one was added, as I would have maxed out all of them before choosing the final option, but didn't feel like restarting to try getting them in a different order. I know it was mentioned that there are 2 endings, so my guess is either that you need to max out all the others, including idle, before the final option, or that there is something else to find. Overall, a pretty good game.
It would have been nice if there was an additional upgrade for the navigation that caused the indicators to be sized based on how far away the target was, so you could prioritize them by distance.