Hey Keltfire,
Wow!!! You're not supposed to beat the "developer's" score!!!! Excellent job!!!! I think the hit box issue is really just a touch of lag on the itch.io servers. I noticed it when I played it online as well. In the standalone mode, it's just so much more responsive and enjoyable. Don't download it though, I would be scared that I didn't provide enough digits in the score box to account for your exceptional play :)
p.s. Thanks for your nice comments :)