Fun entry! Nice job on getting the submission in! Sorry you couldn't get the animations working, that stinks :/
I like the overall possession mechanic, but I wish the enemies would hurt the enemy you're inside. Also it feels weird for the guard's bullet gravity from the enemies to be so heavy during possession. I would suggest using a raycast and to send a mesh out as visual feedback instead!
Solo dev is hard stuff so great job on that! There's a lot of different enemies going on and I think with more time and practice this could be cool!
Good job!