I thought this was kind of fun actually. However even after I collected some food, I tried to press a key indicated for the inventory and nothing happened, and I could not damage the boss by clicking any mouse button or by pressing any key.
It's possible I got a one off bug, or was supposed to do something else, it's possible I might try the game again. I like the assets used for the subway 3D environment, the controls seemed to work for the most part and felt smooth. I like that it was possible to get back up by jumping on the boxes after falling down, something about that felt pretty satisfying.