The work for this game seemed to naturally split into 2 portions :
Work on the player and syringe mechanics, along with laying groundwork for stuff later on.
Scrap 90% of the stuff I was laying the groundwork for, and work on the 10% remaining.
It was pretty fun working on this, although I definitely got a bit lazy with optimization, art, sound effects (there are none!), and an options menu (the last thing to get scrapped). If you go through the project file I uploaded you can see how much stuff I left out. Anyways, that's about it for a post mortem.
I enjoyed working on this, and I hope you enjoy playing!