What an incredible entry.
Great story (with a very cool "twist" at the end) and super fun gameplay. It felt a bit too easy for me at times and I think it might be due to those upgrades being really strong (which is great and I'd much prefer overpowered +60% to something instead of +5% that I won't ever even notice).
The artwork is a bit inconsistent, but that's because it was sourced from different places (which I totally understand - it was better to focus on story, gameplay and audio, because it all paid in the end).
Fantastic job!