I see you have taken "Blood is Fuel" to its logical extreme on this one. Graves emitting light doesn't make the most sense, but using your own life to drop powerful light emitters and be able to pick them back up is actually a fairly interesting take on this Theme.
I can tell when it's Navigation Agent being used on something. They move smoothly and run at you without much other thought. You're not the first submission I've seen either to use this tool.
Overall, it's a competently made product with an interesting take. Well done as a solo dev.