Thanks a lot for your feedback, I'm glad you liked it! The timing is quite tightly controlled on the levels, but getting a running start will help. A couple people have mentioned having trouble with the speed of the door closing, so I think increasing the time the door is open for would help. I'm not sure why you weren't able to download it, maybe a problem with itch? I was able to download it just now, so hopefully the problem has been fixed :)