Neat, but Ruffle failed to load the first game I tried, with reasoning that there is possibly no file to load.
And then I was blocked by Cloudflare, even though there were no Cloudflare scripts to enable (checking in an alternate browser).
edit: It looks like uBlock origin sees the cloudflare scripts, but NoScript does not (and did not display 3 scripts) initially. I'll have to try again later.
It may just be me or my internet, but I tried this specifically to see the effect and it was a very slow escape (seemed delayed starting to load, and then loading the escape page).
I used https://www.canada.ca/en/services/taxes/income-tax/personal-... (or an equivalent page, in case it's shifted around) to look for options a couple years back. I was glad I had this list to look through. I believe I compared Wealthsimple, EachTax, and UFile.