My biggest criticism is that I really liked the song that played in the first little section when you run over the bridge to enter the castle but it’s a very short section so I didn’t get to listen to it much :D But I liked the retro feel of the music in general.
I found that climbing the ladders was a bit awkward and also it was difficult to time the attack properly so I just ended up jumping over all the enemies as it was safer. I assume you can’t kill the saw thing, so maybe if the goblin was the first enemy then I would have felt better trying to get a feel for the attack timing as I wouldn’t lose as much progress from failing.