Wow! That is an exceptional video, perhaps the very best I have seen on this game, thank you so much for uploading. Kudos for your playthrough also, you are clearly very skilled at this, despite the many bugs!
I really do want and need to update this game, at least half the bugs I spotted in your run should not have been there at all. I released a minor update which seemed to have broke many things, huge apologies for that, though you show it will not prevent game completion at least.
The final secret levels I had promised to add and will surely do so in time, along with highscore entry and other minor improvements. At the time this was created my skills with Scorpion Engine were low, I think if I re-did this today I would hope to create a much better and polished version.
As a final note, a contentious issue was the player gravity and movement mechanics. They are far more forgiving than the original game, I did want to make it more accessible for the modern gamer, though again it could be a little more refined further still.
Nevertheless thank you again for sharing this.