I liked your game a lot. You're aware of the door bug so here's a bit of feedback on other things: jump, in some scenes I can jump higher than in others, that should be a flat value imo. I reached the big cube and killed him, but when I went across the door it seemed to reload the same scene (not sure) so he killed me in the end. Also he pushes me and is not being repelled by my attack, don't know if that's a bug or intentional, can understand not being repelled, but being pushed is a bit hard on the player.