I was expecting "Attempt 3" to involve Bluemaxima's Flashpoint, and was surprised not to see it mentioned. Does anyone know why that wouldn't have been an option, or is this essentially what Attempt 1 would have involved?

For anyone not familiar with Flashpoint, it's a project to preserve old flash games and animations and keep them playable on modern platforms. It's open source and includes a huge library (including it looks like Hapland 1-3).

https://bluemaxima.org/flashpoint/

Edit: Reading a bit further down the article, it looks like they were able to make some big improvements by building their own engine like supporting wide screen and higher FPS so that sort of answers my question!