As Eaz_games already mentioned the game is difficult and used its "wall acceleration" mechanic very well. A result of this, there were a couple of times I had to plan on what I should do. And about that .pck file, I use Godot too, and on export settings (the menu that on the left you select the platform and on the right the settings) you can change it so it exports both files as a one file.

The game was deceptively hard. In the last few stage i was gritting my teeth, pressing hard at a or d and hoping it would not fall on the spike. I really like the message you gave at the end as well. 

I have a question though. WHY WOULD A ROBOT RUN FROM A DISEASE??!

would be good for speedruns :)