Hey !
Thanks for the feedback, I will definitely go have a look at your game after :)
To answer your questions, corpse are slowing ennemies so making lifetime longer is a way to keep ennemies furthers from you. But indeed they are very costly because of the physic process, definitely something to improve here :)
for ennemies I'ma happy that you think that too, I wanted to allow player to upgrade them to balance their power, but ended up doing it randomly because I was missing time :p
And yeah for the rest, sfx, UI and balancing, these were also in my todo list, so who knows, maybe I will make an extended version in the futur :p
Thanks again for playing, see you in the review of your game :)